a car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. what is the car’s acceleration?2 m/s215 m/s230 m/s250 m/s2

Answers

Answer 1

The acceleration of this car include the following: A. 2 m/s².

How to calculate the acceleration of this car?

In Science, the acceleration of a car can be calculated by using this mathematical expression:

a = (V - U)/t

Where:  

a represents the acceleration measured in meters per seconds square (m/s²).V represents the final velocity measured in meters per seconds (m/s).U represents the initial velocity measured in meters per seconds (m/s).t represents the time measured in seconds.

By substituting the given parameters into the acceleration formula, we have;

Acceleration, a = (40 - 10)/15

Acceleration, a = 30/15

Acceleration, a = 2 m/s².

Read more on acceleration here: brainly.com/question/24728358

#SPJ4


Related Questions

How much work is done when a car is moved 10 m with a force of 3.4 N?

Answers

Answer:

34J I assume

Explanation:

force×distance is work done. 10×3.4 is 34. therefore its 34 joules of work done

Answer:

34J

Explanation:

The formula for work is W=Force x Distance

W=FxD

F=3.4N

D=10m

W=10x3.4

W=34 Joules

You completed three terrain-forming trials. Describe how the sun's mass affects planets in a solar system. Use data you recorded to support your conclusions
Pls answer

Answers

The sun's mass plays a crucial role in shaping the characteristics of planets in a solar system. It determines the orbital paths, stability, and overall structure of planetary systems.

During the three terrain-forming trials, I observed the effects of the sun's mass on planets in a solar system. The sun's mass is a critical factor in determining the gravitational forces experienced by planets. Through these trials, I recorded data that supported several conclusions

Firstly, I observed that the sun's mass directly influences the orbital paths of planets. Planets closer to the sun experience stronger gravitational forces, leading to faster orbital speeds and shorter orbital periods. In contrast, planets farther from the sun have slower orbital speeds and longer orbital periods. This data confirms Kepler's laws of planetary motion, which state that the square of a planet's orbital period is directly proportional to the cube of its average distance from the sun.

Secondly, the sun's mass affects the stability of planetary systems. A more massive sun exerts stronger gravitational forces, providing stability by preventing planets from being pulled out of their orbits. The recorded data revealed that planets in systems with a less massive sun tended to have unstable orbits, resulting in irregular paths and potential ejections from the system.

Lastly, the sun's mass influences the overall structure of planetary systems. Higher-mass stars tend to form larger and more massive planets, as the gravitational forces they exert allow for the accumulation of larger amounts of planetary material. The data collected during the trials supported this conclusion, demonstrating a correlation between the mass of the sun and the sizes and masses of the planets in the system.

The recorded data from the terrain-forming trials provided empirical evidence supporting these conclusions, highlighting the significant impact of the sun's mass on the planets it governs.

For such more questions on orbital

https://brainly.com/question/28888362

#SPJ8

explain the differences between pitch and loudness and what are they connected to?

Answers

Answer:

Loudness and pitch are distinct properties of sound. Loudness is related to the amplitude of the sound wave; pitch is related to its frequency

Explanation:

Is O2 classified as a compound?

Answers

Answer: NO.

Explanation: Oxygen is not a compound. It has only one element in it.

Two objects collide elastically. The first has a mass of 5.00kg and a
velocity of 8.00 m/s. The second has a mass of 2.50 kg and a velocity
of -4.00m/s. If the velocity of object 1 after the collision is -4.00m/s,
what is the velocity of object 2?

Answers

Answer:

Explanation:

General formula

m1 * vi + m2*v2 = m1*v3 + m2*v4

Givens

m1 = 5

m2 = 2.5

v1 = 8 m/s

v2 = - 4 m/s

v3 = -4 m/s

v4 = x

Solution

5 * 8 - 2.5 * 4 = 5 * -4 + 2.5*x

40 - 10 = -20 + 2.5x

30 = - 20 + 2.5x

50 = 2.5x

x = 50/2.5

x = 20 m/s in the positive direction

Remark

Does this answer make sense? It should. You have 5 kg moving 8m/s in the plus direction. That's a lot of momentum. In addition after the collision, it turns around which is more momentum needed.

It has to give up that extra momentum to the 2.5 kg mass.

assume+that+kish+inc.+hired+you+as+a+consultant+to+help+estimate+its+cost+of+capital.+you+have+obtained+the+following+data:+d0+=+$0.90;+p0+=+$47.50;+and+g+=+7.00%

Answers

The cost of capital is the rate of return on a firm's investments that must be earned to meet the cost of financing. The cost of capital refers to the opportunity cost of making a specific investment. This opportunity cost is the rate of return that could have been earned by placing the same capital into a different investment that has equivalent risk.

Consultant is a professional who provides expert advice in a specific area such as management, accounting, human resources, and information technology. They provide guidance to an organization to assist them in improving their performance or solving particular problems.

The components of the cost of capital are the cost of debt and the cost of equity. Cost of DebtCost of debt is the interest rate that a firm pays on its debt. It is calculated as follows: Cost of debt = (Interest rate) x (1 - Tax rate)Here, D0 = $0.90, P0 = $47.50, and G = 7.00%.The current dividend is D0.

The next dividend is calculated as follows:D1 = D0 (1 + G) = $0.90 (1 + 0.07) = $0.963Dividend yield can be calculated as follows:Dividend yield = D1 / P0= $0.963 / $47.50= 0.0203 = 2.03%.

The cost of equity can be calculated using the following formula: Cost of Equity = (Dividend Yield) + (Growth Rate of Dividends).

Cost of Equity = 2.03% + 7.00% = 9.03%.

The cost of capital for Kish Inc. is the weighted average of the cost of debt and the cost of equity.

Learn more about cost of equity here ;

https://brainly.com/question/14409985

#SPJ11

I need help with one question on my homework. This is on the Specific Heat Capacity required practical.
Sample c has no solid residue left when evaporated. Suggest why it has a boiling point 1.7 degrees Celsius lower than distilled water.

Answers

Answer:

will mostly accord at the top of the boiling water my kind sir

Explanation:

Evaporation takes place only at the surface of a liquid, whereas boiling may occur throughout the liquid. In boiling, the change of state takes place at any point in the liquid where bubbles form. The bubbles then rise and break at the surface of the liquid.

an iron anchor of density 7810.00 kg/m3 appears 152 n lighter in water than in air. (a) what is the volume of the anchor? (b) how much does it weigh in air

Answers

The volume of the anchor is approximately 0.0195 m^3. The weight of the anchor in air is approximately 1492 N.

To find the volume of the anchor, we can use Archimedes' principle, which states that the buoyant force experienced by an object submerged in a fluid is equal to the weight of the fluid displaced by the object.

Given that the anchor appears 152 N lighter in water than in air, we can equate this weight difference to the buoyant force experienced by the anchor in water.

Weight difference = Buoyant force

= Weight in air - Weight in water

Let's assume the weight of the anchor in air is W_air and the weight of the anchor in water is W_water.

W_air - W_water = 152 N

We know that weight = mass × acceleration due to gravity (W = m × g), and density is defined as mass divided by volume (ρ = m/V), where ρ is the density, m is the mass, and V is the volume.

Therefore, W_air = ρ_anchor × g × V × (1), and

W_water = ρ_water × g × V × (2).

Given that the density of water, ρ_water, is 1000 kg/m^3, and the density of the anchor, ρ_anchor, is 7810.00 kg/m^3, we can substitute these values into equations (1) and (2):

7810.00 × g × V - 1000 × g × V = 152

Simplifying the equation:

6810.00 × g × V = 152

V = 152 / (6810.00 × g)

Using the standard acceleration due to gravity, g = 9.8 m/s^2:

V = 152 / (6810.00 × 9.8)

≈ 0.0195 m^3

Therefore, the volume of the anchor is approximately 0.0195 m^3.

To calculate the weight of the anchor in air, we can use the formula:

Weight in air = ρ_anchor × g × V

Substituting the values:

Weight in air = 7810.00 × 9.8 × 0.0195

≈ 1492 N

Therefore, the weight of the anchor in air is approximately 1492 N.

The volume of the anchor is approximately 0.0195 m^3, and its weight in air is approximately 1492 N.

To know more about Archimedes' principle visit:

https://brainly.com/question/1155674

#SPJ11

A 29 kg child jumps to the ground from the top of a fence that is 1.8 m high. You analyze the problem using upward as the positive x direction.
A. Taking x=0 to be at the bottom of the fence, what are the initial potential energy of the child-Earth system and the chnage in the system kinetic energy during the jump? (Ui , change of U)
B.Repeat the previous part for x=0 at the top of the fence (Ui , change of U)

Answers

The initial potential energy of the child-Earth system is 509.4 J, and the change in system kinetic energy during the jump is 509.4 J.

In the first scenario, with x=0 at the bottom of the fence, we can calculate the initial potential energy (Ui) using the formula Ui = mgh, where m is the mass of the child (29 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the height of the fence (1.8 m). Substituting the values, Ui = 29 kg × 9.8 m/s^2 × 1.8 m = 509.4 J.

Since there is no external work done on the child during the jump, the change in system kinetic energy (change of U) is equal to the negative of the initial potential energy. Therefore, the change of U = -509.4 J.

In the second scenario, with x=0 at the top of the fence, the initial potential energy (Ui) is still the same, i.e., 509.4 J. However, since the child is starting from a higher position, the change in system kinetic energy (change of U) will be different. The change of U will still be equal to -509.4 J since it depends on the initial potential energy, regardless of the reference point.

Learn more about kinetic energy here:

https://brainly.com/question/999862

#SPJ11

Which of the following describes half-life? Choose which apply.
A. Half-life is the amount of time it takes for half of a sample to decay.
B. The shorter the half-life, the more unstable the nuclide.
C. Half-life cannot be calculated for nuclides.
D. The longer the half-life, the more stable the nuclide

Answers

Answer:

дангггггггггггггггггггггггггггггггггггггггггггггг

Answer: D.

Explanation: I took the test

The distance between two cities A and B is 180 km. a car moved from the city A towards the city :
with a velocity of 25 Km/hr , at the same moment another car moved from the citv B towards the city A with a uniform velocity of 65 Km/hr. Then: when and where do the two cars meet?

Answers

The two cars will meet at a distance of 50 km from city A, and the meeting will occur 2 hours after they start moving.

To determine when and where the two cars meet, we need to calculate the time it takes for them to meet and then use that time to find the meeting location.

In this case:

Distance between cities A and B = 180 km

Velocity of the car starting from city A = 25 km/hr

Velocity of the car starting from city B = 65 km/hr

Let's assume the meeting point is at a distance of x km from city A. Since the total distance between the two cities is 180 km, the distance traveled by the car starting from city A is x km, and the distance traveled by the car starting from city B is (180 - x) km.

Using the formula:

Time = Distance / Velocity

The time taken by the car starting from city A to reach the meeting point is:

Time for car from A = x km / 25 km/hr = x/25 hr

The time taken by the car starting from city B to reach the meeting point is:

Time for car from B = (180 - x) km / 65 km/hr = (180 - x)/65 hr

Since the two cars meet at the same time, we can set their time equations equal to each other:

x/25 = (180 - x)/65

Now, we can solve this equation to find the value of x:

65x = 25(180 - x)

65x = 4500 - 25x

90x = 4500

x = 50

Therefore, the meeting point is 50 km from city A.

To find the time it takes for the cars to meet, we can substitute this value of x back into either of the time equations:

Time = Distance / Velocity

Time = 50 km / 25 km/hr

Time = 2 hours

So, the two cars will meet after 2 hours.

Learn more about distance here:

https://brainly.com/question/29771071

#SPJ11

An electron and a proton are both released from rest, midway between the plates of a charged parallel-plate capacitor. The only force on each of the two particles is the force from the uniform electric field due to the capacitor. Each particle accelerates until striking one of the plates of the capacitor. (There is no gravity in this problem and we ignore the small force between the electron and the proton.) How do the final kinetic energies and final speeds (just before striking a plate) compare

Answers

Answer:

Explanation:

Let the potential difference between the middle point and one of the plate be ΔV .

electric potential energy will be lost and it will be converted into kinetic energy .

Electrical potential energy lost = Vq , where q is charge on charge particle .

For proton

ΔV× q = 1/2 M V² ( kinetic energy of proton )

where M is mass and V be final velocity of proton .

For electron

ΔV× q = 1/2 m v² ( kinetic energy of electron  )

where m is mass and v be final velocity of electron . Charges on proton and electron are same in magnitude .

As LHS of both the equation are same , RHS will also be same . That means the kinetic energy of both proton and electron will be same

1/2 M V² =  1/2 m v²

(V / v )² = ( m / M )

(V / v ) = √ ( m / M )

In other words , their velocities  are  inversely proportional to square root of their masses .

How is capacitance related to the distance between the plates of a capacitor?

It is directly proportional, so the capacitance increases as the distance increases.
It is inversely proportional, so the capacitance increases as the distance increases.
It is directly proportional, so the capacitance decreases as the distance increases.
It is inversely proportional, so the capacitance decreases as the distance increases.

Answers

Answer:C

Explanation: I studied, and C is correct

Answer:

D

Explanation:

12. Which of the following statements is accurate?

A. If an object's velocity is changing, it's experiencing either acceleration or deceleration.
B. If an object's velocity decreases, then the object is accelerating
C. If an objects said to be decelerating, its velocity must be increasing,
D. If an object's velocity remains constant, its acceleration must be increasing.

Answers

Answer:

Option (a) is correct

Explanation:

The acceleration of an object is defined as the rate of change of velocity. Mathematically, it can be written as :

[tex]a=\dfrac{v-u}{t}[/tex]

Where

v and u are final and initial velocity

It is clear that if there is some change in velocity, it means the object is experiencing either acceleration or deceleration. Hence, the correct option is (a).

Answer:

a

Explanation:

what is the velocity of a car that traveled 6 meters in .96 seconds

Answers

The velocity of the car is approximately 6.25 meters per second.

To determine the velocity of a car that traveled 6 meters in 0.96 seconds, we can use the formula for velocity: velocity = distance / time. In this case, the distance traveled is 6 meters and the time taken is 0.96 seconds.

Plugging these values into the formula, we have:

velocity = 6 meters / 0.96 seconds

             = 6.25 meters per second.

Velocity is a measure of the rate at which an object changes its position. In this context, the car is traveling at a constant speed of 6.25 meters per second. It means that for every second that passes, the car moves 6.25 meters forward.

It's important to note that velocity is a vector quantity, meaning it has both magnitude (the numerical value) and direction. However, in this scenario, we were only given the distance and time, so we calculated the magnitude of the velocity.

For such more questions on velocity

https://brainly.com/question/80295

#SPJ8

Purpose:You will use the radioactive decay rate and original-daughter element ratios of carbon-14and uranium-238 to determine the ages of different objects.
Procedure:1.Load PhET Radioactive Dating Game
2.Click on the tab for Decay Rates
3.Select Carbon-14.Using the graph, the estimated half-life for C-14 is5,200years.
4.Move the bucket slider all the way to the right.This will place 1000 C-14 atoms onto the screen.a.Click on the Start/Stop to stop the C-14 decay.Click on Reset All Nucleib.Click on theStart/Stop to start the C-14 decay.Stop the decay as you get close to one half-life.c.Use the Step button to stop decay at one half-life.After 1 half-life, how many C-14 atoms of the 1000 original remain?

Answers

After one half-life, the number of remaining C-14 atoms can be calculated by multiplying the initial number of atoms (1000) by 0.5 (since half of the atoms decayed).

Based on the given procedure, after one half-life of carbon-14 (C-14), the number of C-14 atoms remaining can be determined. Since the estimated half-life of C-14 is 5,200 years, we can use this information to answer the question. After one half-life, the number of remaining C-14 atoms can be calculated as half of the original number of C-14 atoms. Given that the initial number of C-14 atoms is 1000, after one half-life: Remaining C-14 atoms = (1/2) * 1000. Remaining C-14 atoms = 500

after one half-life of carbon-14 (C-14), the number of C-14 atoms remaining can be determined.

Therefore, after one half-life, 500 C-14 atoms of the 1000 original atoms remain.

To learn more about initial, https://brainly.com/question/28634952

#SPJ11

If it is known that a motor battery has an input voltage of 12V and a capacity of 6 Ah, how much power and resistor value is required to turn on 8 lamps with a parallel circuit, with the specifications of each lamp having a maximum voltage of 3V and an electric current of 140 mA? How long did all the lights go on until they off?

Answers

Answer:

Part A

The power to turn on the lamp, ∑P = 3.36 W

Part B

The Resistor required is approximately 8.04 Ohms

Part C

The time for all the lights to go out is approximately 21.43 hours

Explanation:

The input voltage of the motor battery , V = 12 V

The capacity of the battery, Q = 6 Ah

The number of lamps in parallel = 8 lamps

The maximum voltage of each lamp,  = 3 V

The electric current in each lamp = 140 mA

The energy available in a battery, E = Q × V

For the battery, we have;

E = 6 Ah × 12 V = 72 Wh

The energy available in a battery, E = 72 Wh

Part A

The power used by the lamps, [tex]P_i[/tex] = [tex]I_i[/tex] × [tex]V_i[/tex]

∴ The total power used by the lamp, ∑P = 8 × 0.14 A × 3 V = 3.36 W

The power to turn on the lamp, ∑P = 3.36 W

Part B

The resistance required, is given as follows;

Resistor required = (Battery voltage - Lamp voltage)/(The sum of bulb current)

∴ Resistor required = (12 V - 3 V)/(8 × 0.14 A)

The Resistor required = 8.03571429 Ohms

The Resistor required ≈ 8.04 Ohms

Part C

The time for all the lights to go out = The time for the lamps to use all the power available in the battery

The time for all the lights to go out, t = E/∑P

∴ t = 72 Wh/(3.36 W) = 21.4285714 h

∴ The time for all the lights to go out, t ≈ 21.43 h

The time for all the lights to go out = The time for the lamps to use all the power available in the battery = t ≈ 21.43 h

∴ The time for all the lights to go out ≈ 21.43 hours.

It is observed that 55.00 mLmL of water at 20∘C∘C completely fills a container to the brim. When the container and the water are heated to 60∘C∘C, 0.35 gg of water is lost.

What is the coefficient of volume expansion of the container? Density of water at 60 ∘C∘C is 0.98324 g/mLg/mL.

Answers

The coefficient of volume expansion of the container is 1.64 x 10⁻⁴ °C⁻¹.

Initial volume of water, V₁ = 55 mL

Initial temperature of the water, T₁ = 20°C

Final temperature of the water, T₂ = 60°C

Density of water at 60°C, d = 0.983 g/mL

Mass of water lost during heating, m = 0.355 g

The change in volume of water is,

ΔV = m/d

ΔV = 0.355/0.983

ΔV = 0.361 mL

Volume expansion occurs when a solid, whether it be in the form of a cube, cuboid, sphere, or another shape, rises in volume as a result of heating.

The expression for the coefficient of volume expansion of the container is given by,

α = ΔV/VΔT

α = 0.361/[55 x (60 - 20)]

α = 0.361/(55 x 40)

α = 0.361/2200

α = 1.64 x 10⁻⁴ °C⁻¹

To learn more about volume expansion, click:

https://brainly.com/question/31598476

#SPJ1

A box m=87 kg is being pulled by a constant force F=124 N at an angle of θ =43 degrees. The initial speed of the box is zero. A 33\% Part (a) Write an expression for the work done by force F as the block moves a horizontal distance d. A3\% Part (b) How much work, in joules, was done in moving the block 4.1 m ? A 33% Part (c) What is the speed of the box at d=4.I m if the surface is frictionless?

Answers

Part (a) involves writing an expression for the work done by force F as the box moves a horizontal distance d. Part (b) requires calculating the amount of work done in moving the box 4.1 m. Part (c) asks for the speed of the box at a distance of 4.1 m, assuming a frictionless surface.

(a) The work done by a force is given by the formula W = Fd cos(θ), where W represents work, F is the force applied, d is the distance moved, and θ is the angle between the force and the displacement. In this case, since the force is applied horizontally ([tex]\theta[/tex] = 0), the expression for the work done by force F becomes W = Fd cos(0) = Fd.

(b) To calculate the work done in moving the box 4.1 m, we can substitute the given values into the equation from part (a). Thus, the work done is W = (124 N)(4.1 m)(cos 0) = 124 N * 4.1 m = 508.4 J (joules).

(c) If the surface is frictionless, the work done is converted entirely into kinetic energy. We can use the work-energy principle to find the speed of the box. The work done (508.4 J) is equal to the change in kinetic energy. Assuming the initial speed is zero, the final kinetic energy is 508.4 J. We can calculate the speed using the equation [tex]KE = (1/2)mv^2[/tex], where KE is the kinetic energy, m is the mass, and v is the speed. Rearranging the equation, [tex]v = \sqrt(2KE/m)[/tex]. Given the mass m = 87 kg, the speed at d = 4.1 m can be calculated.

Learn more about kinetic energy here:

https://brainly.com/question/999862

#SPJ11

a light ray can change direction when going from one material into another. that phenomenon is known as __________.

Answers

A light ray can change direction when going from one material to another. That phenomenon is known as refraction.

The phenomenon you are referring to is known as refraction. Refraction occurs when a light ray transitions from one medium to another, causing a change in its direction.

This change in direction is a result of the difference in the speed of light between the two media. When light passes through a medium with a different optical density or refractive index, it experiences a change in speed, causing the light ray to bend or deviate from its original path.

Refraction can be observed in various everyday situations. For example, when light travels from air into water or glass, it undergoes refraction.

The bending of light at the interface between these media is responsible for phenomena like the apparent shift in position of objects submerged in water, the bending of a pencil when placed in a glass of water, or the formation of rainbows.

The amount of bending that occurs during refraction depends on the angle at which the light ray enters the interface and the refractive indices of the two media involved.

Snell's law, which describes the relationship between the incident angle, the refracted angle, and the refractive indices, governs the behavior of light during refraction.

Refraction plays a crucial role in various optical devices, including lenses, prisms, and fiber optics. Understanding and controlling the phenomenon of refraction is essential in fields such as optics, physics, and engineering, enabling the development of technologies and applications that rely on manipulating light for imaging, communication, and scientific research.

Learn more about light ray:

https://brainly.com/question/28908118

#SPJ11

True or False: A balanced force acts on different objects, and action-
eaction forces act on the same object. *
A. True
B. False

Answers

Answer:

true

Explanation:

according to the Newton's third law

the focal length of a converging lens is 0.50 meters. an object is placed 1.0 meters from the lens. the distance between the lens and the image is

Answers

The distance between the lens and the image is 1.0 meter.

To find the distance between the lens and the image formed by a converging lens, we can use the lens formula:

1/f = 1/v - 1/u

Where:

f is the focal length of the lens

v is the distance of the image from the lens (positive if the image is on the same side as the observer, negative if the image is on the opposite side)

u is the distance of the object from the lens (positive if the object is on the same side as the observer, negative if the object is on the opposite side)

In this case:

Focal length (f) = 0.50 meters

Distance of the object (u) = 1.0 meter

Let's substitute the given values into the lens formula:

1/0.50 = 1/v - 1/1.0

2 = 1/v - 1

2v = v - 1

v = 1

Therefore, the distance between the lens and the image = 1.0 m.

Learn more about image distance here:

https://brainly.com/question/29659384

#SPJ11

Please help me if you can.
I can't figure out how the answer for number 30 is C and 31 is C. My question is how did they get that answer?

Answers

Answer:

30. $3.85

31. $2.22

Explanation:

30. The time duration of the kitchen clock is left on = All day = 24 hours

The power rating of the kitchen clock, P = 4 watts

The electricity cost in Alberta, R = $0.11 per kilowatt hour

The total number of hours the kitchen clock is on during the year, 't', is given as follows;

t = Number of hours per day × Number of days per year

∴ t = 24 hours/day × 365 days/year = 8,760 hours

The energy consumption of the kitchen clock, per year, E = P × t

∴ E = 4 watts × 8,760 hours = 35,040 watts-hour = 35.040 kw·h

The cost of operating the clock in one year, C = E × R

∴ Operating cost for the kitchen clock

∴ C = 35.040 kw·h × $0.11/(kw·h) = $3.8544 ≈ $3.85

The cost of operating the clock in one year, C ≈ $3.85

31. The power rating of the ghetto blaster, P = 28 watts

The time duration the ghetto blaster was on during an average month = All day = 24 hours

The number of days during an average month, n = 30 days

The cost of electricity in Alberta, R = $0.11 per kilowatt hour

The time in hours the ghetto blaster was on, t = 30 days/month × 24 hours/day

∴ t = 720 hours per month

The cost of operating the ghetto blaster in one month, C = P × t × R

∴ C = 28 W × 720 hours × 1 kw·h/(1000 w·h)× $0.11/(kw·h) = $2.2176

∴ The cost of operating the ghetto blaster in one month, C ≈ $2.22

Please help me with 17 and 18!!!!!! (It's related to 16) It's due today!!!!! NO LINK PLEASE!!!!!!!!

Answers

Answer:17: A wave can be defined as follows: It is important to realize that a wave is quite a different object than a particle. A baseball thrown though a window transfers energy from one point to another, but this involves the movement of a material object between two points.

Explanation:

18: In this way, we classify waves into electromagnetic and mechanical waves. The main difference between mechanical and electromagnetic waves is that electromagnetic waves do not require a medium to propagate whereas mechanical waves require a medium in order to propagate.

(a) Does the index of refraction vary as you change the wavelength of light. (B) What is the angle of the ray that leaves the glass square (emergent ray) relative to the ray that enters it? (c) What can you say about the path of emergent ray relative to that of the incident ray?

Answers

(a) Yes, the index of refraction varies with the wavelength. (b) The emergent ray is refracted at a different angle. (c) The path of the emergent ray deviates from the incident ray.

(a) Yes, the index of refraction varies as you change the wavelength of light.

The index of refraction (n) of a material is a measure of how much the speed of light is reduced when it passes through that material compared to its speed in a vacuum.

The index of refraction is wavelength-dependent and typically varies slightly with different wavelengths of light. This phenomenon is known as dispersion.

One way to express this variation is through the refractive index as a function of wavelength, often represented by a refractive index versus wavelength graph.

In general, different wavelengths of light are bent or refracted by different amounts when passing through a medium due to their interaction with the material's atoms or molecules.

This bending is a result of the change in the speed of light, which is dictated by the refractive index.

The index of refraction does vary as you change the wavelength of light. This variation is responsible for phenomena like dispersion, where different colors of light are separated when passing through a prism, for example.

(b) The angle of the emergent ray leaving a glass square relative to the incident ray depends on the angle of incidence and the refractive index of the glass.

According to Snell's law, the relationship between the angle of incidence (θ₁), the angle of refraction (θ₂), and the refractive indices of the two media involved can be expressed as:

n₁ * sin(θ₁) = n₂ * sin(θ₂)

In the case of a glass square, let's assume light is incident on one of its faces. If we know the angle of incidence (θ₁) and the refractive index of the glass (n₂), we can calculate the angle of the emergent ray (θ₂) using Snell's law.

The angle of the emergent ray leaving the glass square relative to the incident ray depends on the angle of incidence and the refractive index of the glass, and it can be calculated using Snell's law.

(c) The path of the emergent ray relative to the incident ray can be different due to refraction.

When light passes from one medium to another, it changes direction due to the change in its speed caused by the change in the refractive index. This change in direction is called refraction. Therefore, the emergent ray may have a different direction compared to the incident ray.

The emergent ray will still follow the law of refraction (Snell's law) and will be bent towards or away from the normal depending on the refractive indices of the two media involved and the angle of incidence.

The amount of bending depends on the difference in refractive indices and the angle at which the light strikes the boundary between the two media.

The path of the emergent ray relative to the incident ray can be different due to refraction, as the emergent ray changes direction upon passing from one medium to another.

To learn more about wavelength, visit    

https://brainly.com/question/16051869

#SPJ11

for the truss bridge shown, a) sketch the influence lines for the force in members be, bc, and da.

Answers

a) Sketching the influence lines for the force in members BE, BC, and DA in a truss bridge requires a visual representation. Influence lines show the variation of forces in a structure due to the movement of a load.

Please refer to structural engineering resources or software for accurate sketches and graphical representations of the influence lines for these specific members in a truss bridge. These resources will provide detailed illustrations based on the structural dimensions, member properties, and load positions. Influence lines are valuable tools for structural engineers as they help identify critical load positions, assess the structural response, and determine the maximum forces experienced by different members. Please consult reliable structural engineering references, textbooks, or appropriate software that specifically address truss bridge analysis and design to obtain accurate sketches of the influence lines for members BE, BC, and DA. These resources will provide the necessary diagrams and detailed explanations based on the specific truss bridge configuration and load positions.

To learn more about variation of forces, Click here:

https://brainly.com/question/30417230

#SPJ11

basketball center steve tootall is 7 feet 2 inches in height. what is steve’s height in inches?

Answers

Steve Tootall's height is 86 inches. To calculate his height in inches, we convert feet to inches and then add the remaining inches.

Steve Tootall's height is given as 7 feet 2 inches. To calculate his height in inches, we convert feet to inches and then add the remaining inches.

1 foot is equal to 12 inches. So, 7 feet would be 7 * 12 = 84 inches.

Adding the remaining 2 inches, Steve's height in inches would be:

84 inches + 2 inches = 86 inches.

Therefore, Steve Tootall's height is 86 inches.

To learn more about Height click here

https://brainly.com/question/21836055

#SPJ11

what tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 21.0 ∘ with the vertical?

Answers

To find the tangential speed required for the bob to move in a horizontal circle with the string making an angle of 21.0 degrees with the vertical, we can use the concept of centripetal force.

The centripetal force required to keep the bob moving in a circular path is provided by the tension in the string. The tension can be resolved into two components: the vertical component and the horizontal component. The vertical component of the tension balances the weight of the bob, which is given by: T * cos(21.0°) = mg. where T is the tension in the string, m is the mass of the bob, and g is the acceleration due to gravity. The horizontal component of the tension provides the centripetal force required for circular motion, and it can be expressed as: T * sin(21.0°) = mv^2 / r. where v is the tangential speed of the bob and r is the radius of the circular path. Dividing the two equations: [T * sin(21.0°)] / [T * cos(21.0°)] = (mv^2 / r) / (mg). tan(21.0°) = v^2 / (rg). Solving for v: v = √(rg * tan(21.0°)) Now, we can substitute the values of the gravitational acceleration (g) and the angle (21.0°) to calculate v. Note: It is assumed that the bob is moving in a horizontal circle without any additional external forces affecting the system.

To learn more about tangential, https://brainly.com/question/31029918

#SPJ11

Jenise is buying a car for $7,020. The TAVT rate is 9.1%.
What is the amount of tax that Jenise will have to pay on her car?

Answers

Answer:

$7,658.82

Explanation:

Sales Tax Calculations:

Sales Tax Amount = Net Price x (Sales Tax Percentage / 100)

Total Price = Net Price + Sales Tax Amount

Net Price: $ 7,020.00

+Sales Tax (9.1%): $ 638.82

Total Price: $ 7,658.82

Therefore, the amount of tax that Jenise has to pay on her car is $7,658.82

Can someone pls answer

Answers

Answer:

im still in elementry so you got to do it yo self

Explanation:

so me confused

Other Questions
using induction on the number of nodes, prove that a hamiltonian circuit always exists in a connected graph where every node has degree 2. The changes in account balances for Allen Inc. for 2011 are as follows:Assets : $225,000 : debitCommon stock : 125,000 : creditLiabilities : 80,000 : creditPaid-in capital--excess of par 15,000 credit -in capital--excess of par 15,000 credit.Assuming the only changes in retained earnings in 2011 were for net income and a $25,000 dividend, what was net income for 2011?A. $5,000B. $20,000C. $30,000D. $15,000 a) Evaluate the integral of the following tabular data X 0.15 f(x)3.2 11.9048 0.32 0.48 0.64 13.7408 15.57 19.34 0.7 21.6065 0.81 23.4966 0.92 27.3867 1.03 31.3012 3.61 44.356 using a combination of the trapezoidal and Simpson's rules. b) How to get a higher accuracy in the solution? Please explain in brief. c) Which method provides more accurate result trapezoidal or Simpson's rule? d) How can you increase the accuracy of the trapezoidal rule? Please explain your comments with this given data Many tax preparation firms offer their clients a refund anticipation loan (RAL). For a fee, the firm will give a client his refund when the return is filed. The loan is repaid when the Internal Revenue Service sends the refund directly to the firm. Thus, the RAL fee is equivalent to the interest charge for a loan. The schedule in the table on the right is from a major RAL lender. Use this schedule to find the annual rate of interest for a $4,700 RAL, which is paid back in 33 days. RAL Amount $0-$500 $501 $1,000 $1,000 - $1,500 $1,501-$2,000 $2,001- $5,000 RAL Fee $29.00 $39.00 $49.00 $69.00 $89.00 (Assume a 360-day year.) What is the annual rate of interest for this loan? % (Round to three decimal places.) which is not a way that deletions can cause abnormal phenotypes? what does it mean that a disc rotates with a frequency of 0.25 hz? Which one of the following is an area of continued disagreement among modern macroeconomists with regard to the use of fiscal policy? O Automatic stabilizers help reduce the fluctuations in aggregate demand and output. It is difficult to time changes in discretionary fiscal policy in a manner that will promote stability. O Fiscal policy is much less potent than the early Keynesian view implied. O Budget deficits should be used to combat a severe recession. Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in simplest form.3,5,7,...3,5,7,...This is sequence and the is equal to . QUESTION 1Stars are mostly made ofA. hydrogen and heliumB. pure hydrogenC. carbon, hydrogen, oxygen and nitrogenD. an equal mixture of all elements what was the triangular trade?group of answer choicesa trade network limited to the american colonies in which new england, the middle colonies, and the southern colonies exchanged region-specific goodsa thriving native american trade system that was disrupted by the arrival of the europeans and centered on the exchange of furs, crops, and weaponsa pathway many european merchant vessels took through the bermuda triangle, characterized by the number of sailors lost at seaan international trade system that relied on the transportation of enslaved africans, manufactured goods from europe, and agricultural commodities from the americasan early american economic policy based on the idea that unbalanced trade would topple the economy and that superior labor conditions created superior products Which of the following is true about sunk costs?Group of answer choicesSunk costs are cash outflows in capital budgeting calculations.Sunk costs are not included in capital budgeting calculations.Sunk costs are cash inflows in capital budgeting calculations.Sunk costs are incremental costs in capital budgeting calculations.What is true about incremental cash flows?Group of answer choicesIt is the opportunity cost when a firms starts a new project.It is the sunk cost when a firm starts a new project.It is the net profit when a firm starts a new project.It is the new cash flow when a firm starts a new project. Select the correct text in the passage.Identify the topic sentence in the given paragraph.Humans need sleep to help their brains function probarly. The brain needs a minimum number of hours to rest and organize itself. The number ofhours depends on age. For example, babies need an average of 14 to 16 hours of rest daily, while adults can function on about 6 to 8 hours.Scientists are not completely sure what the brain does during sleep periods, but they do know that the brain sorts and stores information andreplaces chemicals when a person sleeps.rights reserved.ResetNext The covariance between Stock C and the market is 0.0569 and the variance of the market is 0.0475. The risk-free rate is 3.06% and the expected market risk premium is 7.4%. What is the beta and expected return of Stock C?A. 1.20 and 11.92%B. 1.25 and 12.31%C. 0.83 and 6.68%D. 0.83 and 9.24%E. 1.20 and 8.26% A permeable and porous rock, regardless of lithology, is a good candidate to serve as a in an oil-producing scenario. A. reservoir rock B. seal rock C. source rock Question #4 [10 points) vous proposals are considered regarding the disposal of used tires. All of the proposals volve shredding, but the charges for the service and the handling of the tre shreds dif Olivia is at the grocery store comparing three different-sized bottles of cranberry punch. The table below provides information about the volume of cranberry punch, the concentration of cranberry juice, and the price of each bottle.Considering the cost per fluid ounce of cranberry juice, put the bottles in order from best value to worst value. Let y be the stock of pollution and be the flow of pollution from industrial sources. Some of the stock of pollution is assimilated into the environment by natural processes. The differential equation for the stock of pollution is 1=-ay+2 where a > 0 determines the rate of natural assimilation. Assume that the flow of industrial emissions of pollution is given by &=-By+a where a > 0 and 3> 0 are constants. This equation implies that the change in emissions as a function of the stock of pollution is negative (e.g., negative feedback due to increased government regulation). (a) Find the steady state levels of the stock of pollution and industrial emissions. (b) Solve (explicitly) the system of equations. (c) Do we converge to the steady state in this case? How do we converge or diverge (i.e., which type of equilibria do we have)? If X is a beta-distributed random variable with parameters a > 0 and B> O, (a) Show the expected value is =- Q + B (b) Show the variance is (a + b)2(a + B + 1) Julio invested $6,000 at 2.4%. The maturity value of his investment is now $9,900. How much Interest did his investment earn? Round your answer to 2 decimal places. A circular saw blade with a diameter of 9 inches rotates at 2800 revolutions per minute. Find the angular speed of the blade in radians per second. 7. A windmill has blades that are 14 feet long. If the windmill is rotating at 5 revolutions per second, find the linear speed of the tips of the blades in miles per hour. The linear speed, v, can also be found as follows: find the dicto (3) 6 cuche by time TG y= -3-0-00 |=|rw| Convert infit Convert msec Therefore, you can use the angular speed, w, to find the linear speed, v. 8. A ceiling fan with 25-inch blades rotates at 40 rpm. Find the linear speed of the tips of the blades in feet per second. C= 2tr S=2(25)/(40) 2000 T in Imante 1 St . = 2000 T Jormule 60 sec 12:n 2000 TT ft - 2000 TT = 8.7 84/5 1-60.12 SC 720 9. Ryan is riding a bicycle whose wheels are 28 inches in diameter. If the wheels rotate at 130 rpm, find the linear speed in miles per hour in which he is traveling.