A block with mass M slides down an incline of angle θ at constant velocity v.
Which of the following expressions is equal to the magnitude of frictional force between the block and the incline? (Note: The acceleration of gravity g = 10 m/s2.)
A.M∙g∙sin θ
B.M∙g∙cos θ
C.M∙g / sin θ
D.M∙g / cos θ

Answer:

It is most likely that the score on the second test should be close to 130 as IQ is a steady measurement. Intelligence quotient (IQ) is a measure of a person's cognitive ability and is typically considered to be a stable trait that does not change significantly over time. While some research has suggested that certain aspects of cognitive ability may improve with age, the overall IQ score is generally considered to be a consistent measure of cognitive ability. Therefore, it is unlikely that Juanita's score on the second test would be significantly different from her score on the first test.

Sorry if I answered it late :D

Answer:

1.43m

Explanation:

Given data

m1= 50kg

m2=70kg

We are told that Sally m1= 50 sat at one end which is 2m from the center

Hence, the summation of clockwise moment = summation of anticlockwise moment

See the attached image for your reference

50*2= 70*x

100= 70x

x= 100/70

x=1.43m

Hence the mass m2 will be at the 1.43m mark for the net torque to be zero

n unit vector notation, -22j is the torque about the origin on a particle located at coordinate (o, -4.0m, 3.0m)


Torque is defined as the force that can cause an object to rotate along an axis is measured as torque. Estimate the angle between the vector connecting the force's application point and the pivot point and the direction of the applied force. You may calculate the torque by multiplying r by F and sin.

T=R (distance) x F (Force)

R=-4j+3k

F=2J

Hence, t=  R x F vector product

=(-4j+3k)x2j

=-4x2x(y x J)

=+3x2y(k x r)

=-8x(-k)+6j

=(6j+8k) nm

b) F^2=2J+4K

Hence, t=r x f^2

=(-4j+3k)x(2j+4k)

=0-16( J x k)+6(K x J)+0

=-16j-6j

=-22j  

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Answer:

1. grass Can survive by itself because it is not dependent on food, it is self-sustaining. and since grass it's not dependent on food it is a producer.

2. and 3. they would all decrease, since the prairie dogs are herbivores they eat basically plants such as grass and if half of the grass is gone then they would have less to eat and therefore decrease.

since ferrets eat prairie dogs, if the prairie dogs population decreases the ferrets would have less to eat and therefore decrease as well.

one of the predators of ferrets are foxes and if the ferrets decrease then the fox would also decrease since it will have less to eat.

4. if we would continue advancing years soon the ferret, prairie dogs and foxes would be no more because if there is less grass they would keep on decreasing over the years until they would be extinct.

The correct statement is the water absorbed energy continuously, but the temperature increased only when all of the water was in one phase.

this is explained by the latent heat of fusion. The melting point of ice ( at which ice melts into water) is 0 degree Celcius. This temperature remains constant till all 10 g of ice melts completely and water comes in the same phase of liquid.

The latent heat of fusion, also known as enthalpy of fusion, is defined as the total amount of heat energy supplied to a solid substance to start a change in its physical state from a solid to a liquid state. Given the pressure of the environment is constant.

The correct option is (b).

The given question is incomplete, the complete question is

The image below shows how the temperature of 10 g of ice changes as energy is added. which statement is correct?

(a) The water absorbed energy continuously and temperature increases while water is changing phase.

(b) The water absorbed energy , but the temperature increased only when all of the water was in one phase.

(c) Temperature of the water remained constant.

(d) Temperature always increases.

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The magnitude of the force of the roller-coaster track on the bottom of each clip can be ranked from largest to smallest as follows: R = 50 m, speed = 10 m/s R = 100 m, speed = 10 m/s R = 50 m, speed = 5 m/s.

The magnitude of the force of the roller-coaster track on the bottom of a clip is determined by the radius of curvature of the track and the speed of the clip.

For a given radius of curvature and speed, the magnitude of the force will be larger when the radius of curvature is smaller and the speed is larger, and smaller when the radius of curvature is larger and the speed is smaller.

Based on this information, the magnitude of the force of the roller-coaster track on the bottom of each clip can be ranked as follows:

R = 50 m, speed = 10 m/s

R = 100 m, speed = 10 m/s

R = 50 m, speed = 5 m/s

The magnitude of the force of the roller-coaster track on the bottom of the clip with a radius of curvature of 50 m and a speed of 10 m/s will be the largest. The magnitude of the force of the roller-coaster track on the bottom of the clip with a radius of curvature of 100 m and a speed of 10 m/s will be smaller. The magnitude of the force of the roller-coaster track on the bottom of the clip with a radius of curvature of 50 m and a speed of 5 m/s will be the smallest.

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The velocity of the eight ball immediately after the collision is 1.41 m/s.

The final velocity of the eight ball after the collision is calculated by applying the principle of conservation of linear momentum;

m₁u₁  +  m₂u₂  = m₁v₁   +  m₂v₂

where;

(0.17)(1.35) + (0.156)(0) = (0.17)(0.06) + (0.156v₂)

0.2295 = 0.0102 + 0.156v₂

0.156v₂ = 0.2193

v₂ = 1.41 m/s

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The stone's greatest height over the cliff is 2.04s and it takes it and the stone respectively seconds to get there 20.4s

Given:

The stone's starting velocity is 20m

The cliff rises to a height of.100. meters

Concept:

The stone will move when it is hurled upward from the top of the cliff owing to the acceleration caused by gravity. Because the acceleration on the stone is operating in the direction opposite to its motion, the speed of the stone will decrease as it climbs upward.

When the stone reaches its highest point and briefly comes to rest, its speed will be zero.

the length of time it took the stone to stand at its tallest

The time it took the stone to reach its highest point is provided by:

0 = 20-(9.8)t

t = 20/9.81  s

= 2.04 s

Here, the stone's time, beginning velocity, ultimate velocity, acceleration, and time are all shown.

[tex]v^{2} f = vi^{2} -2gs[/tex]

Replace the values in the equation above.

The distance the stone traveled to attain its greatest height is calculated as follows:

[tex](0)^{2} = (20)^{2} - 2(9.81)s\\s = \frac{400}{19.62} m\\20.4 m[/tex]

The stone's travel distance is shown here.

Replace the values in the equation above.

As a result, the greatest height that the stone can reach over the cliff is 2.04 m and the time it takes to get there are both equal to 20.4 m

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If a wavelength of a wave increases, but the wave speed remained the same, the frequency will decrease (option B).

Wavelength is the length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next.

The wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency as follows:

λ = v/f

According to the above equation, the wavelength is inversely proportional to the frequency of the wave, hence, as one increases, the other decreases and vice versa.

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Answer:

yes I think it is possible

Hikers frequently take photos in the area, and bear behavior is generally observed during the evening and morning hours, so precautions should be taken to avoid a bear attack and promote safe hiking.

People frequently visit the forest, mountains, and other areas where humans and wildlife interact, such as the forest, where bears, elephants, and other wildlife roam freely, and hikers should be aware of this fact and take precautions, such as standing still when a bear approaches.

Hence, hikers frequently take photos in the area, and bear behavior is generally observed during the evening and morning hours, so precautions should be taken to avoid a bear attack and promote safe hiking.

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According to Doerbecker and Ernst (1996) and Francart et al. (2011), interaural time difference (ITD) and interaural level difference (ILD) are the two primary auditory cues used by binaural hearing. The delay between each ear is known as ITD.

What technique best localizes sound between the two ears?

Rayleigh's view of horizontal sound localization has come to be known as the “duplex” theory: that sound localization at low frequencies relies on differences in phase at the two ears, or ITDs, and that high-frequency localization relies on interaural differences in sound level (ILDs).

What two variables affect sound localization?

The variation in the loudness of the sound in each ear and the time it took for the sound to reach each ear are two elements that affect how the sound is localized.

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The things which can be replaced after the low-speed collisions are airbags, dents on the car, the broken mirror or any part, etc.

A car accident that happens while moving less than 10 miles per hour is referred to as a low-impact or low-speed collision. There are several situations that could result in a low-impact collision. Accidents in crosswalks or other pedestrian zones are only a few instances.

Here, are some things you should replace after the collision,

1. Vehicle assistance technologies

Even though your car may appear to be in good condition, it may not be performing at its best. Modern cars are equipped with a ton of high-tech features, such as several electronic sensors, cameras, and radar that constantly monitor your car.

2. Diagnostic error codes

The structural integrity of the car's frame, as well as the functionality of its steering and suspension components, are all thoroughly inspected. Scanners should be available to reputable shops so they may look for diagnostic trouble codes (DTCs) that may have been set off by an accident.

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This object, which is located in an asterism with Kochab and Pherkad, has a decreasing amplitude, which indicates that it has left the instability strip in Polaris.

The focus of a sentence. In most cases, the subject's verb is acting on a person, place, or thing, which is the object. The noun or pronoun that follows the verb is the simplest place to seek for the object in a short phrase, as you might expect.

In other words, it is precisely as it was before being depicted in all aspects. It is true that an object is typically—but not always—modified in some manner when it is represented. but by the Object in itself.

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Answer:

One thing that is demonstrated by plotting the results of IQ tests on a bell curve is that most scores fall in the middle of the curve, with fewer scores outside the curve. This reflects the fact that IQ scores are typically distributed in a normal or bell-shaped curve, with most scores falling around the average, and fewer scores falling at the very high or very low ends of the distribution. The bell curve is a useful tool for visualizing the distribution of IQ scores, and it can help researchers and psychologists understand the typical range of scores and identify any unusual patterns or outliers. It is not accurate to say that most scores are above average or below average, or that there is a large difference between the scores of women and men. These statements do not accurately reflect the findings of IQ tests or the use of the bell curve to analyze their results.

If a microwave is used to cook food, the wavelength of these microwaves are on the order of millimeters. Approximately 1010 Hz is the frequency of the microwaves.

A waveform signal's wavelength is defined as the separation between two identical locations (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. This length in wireless systems is typically expressed in metres (m), centimeters (cm), or millimeters (mm) (mm).

UV, X, and gamma rays are examples of shorter wavelength and higher frequency electromagnetic waves. Microwaves, radio waves, and infrared light are examples of radio energy with higher wavelength and lower frequency.

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In 0.10 s, total flux through such a wiring loop increases uniformly from 4x10-'Wb through 5x10-5 Wb. The coil experiences an induced emf of 1*10⁻⁴ v.

A distribution of something like the electromagnetic field or the velocity at which the electric field moves throughout a specific area can both be measured as electric flux. The Greek letter e is used to represent electric flow. Electric flux is measured in SI units as or Nm 2 C – 1.

E is the amplitude of the electrostatic potential (with units of V/m), and if the magnetic charge is constant, the electric flux (E) travelling through a material of vector area S equals: E = ES = EScos.

change in magnetic flux d∅ = (5*10⁻⁵ - 4*10⁻⁵) wb

d∅ = 1*10⁻⁵wb

time = 0.10 sec.

induce emf, e = -d∅/ dt

[e] = d∅/ dt

[e] = 1*10⁻⁵ / 0.10 v

[e] = 1*10⁻⁴ v.

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The combustion of methane can be calculated using the data from the bomb calorimeter and the amount of water in it.

First, determine the heat of the combustion of methane. This can be done by taking the heat capacity of the calorimeter, subtracting the heat capacity of the water, and then multiplying the resulting number by the mass of methane used.

For example, if the heat capacity of the calorimeter is 5 kcal/°C and the heat capacity of the water is 1 kcal/°C, and the mass of methane used is 2 g, the heat of combustion of methane would be (5 - 1) x 2 = 8 kcal.

Next, calculate the change in temperature of the water. This can be done by taking the heat of the combustion of methane and dividing it by the heat capacity of the water.

For the example above, the change in temperature of the water would be 8 kcal/1 kcal/°C = 8°C.

Finally, calculate the combustion of methane. This can be done by taking the heat of the combustion of methane and dividing it by the change in temperature of the water.

For the example above, the combustion of methane would be 8 kcal/8°C = 1 kcal/°C.

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An item put in front of a diverging lens will always seem virtual and upright. Knowing the characteristics of the image created by a converging and diverging lens is necessary to choose the best option out of all the possible choices.

A lens is a transparent material, such as a piece of glass, that is used to concentrate light from an object to create a picture of it.

A transparent piece of material with two opposite regular surfaces that are either both curved or one is curved and the other is plane, and that are used individually or together in an optical instrument to focus light to create an image.

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Approximants is the name given to consonants that have a much larger air path, leading in a smooth airflow as opposed to a turbulent airflow.

The vocal tract is only minimally constrained enough to cause air to become turbulent—to produce the four English 3.43 sounds (/l/, /r/, /w/, and /y/). For English language learners working on pronunciation and accent reduction, these sounds can be particularly challenging.

In English, there are just four approximates, and each of them is voiced. Additionally, they are all produced the with soft palate lifted, making them all oral noises. The English version 3 are explained below.

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Answer: Is the bird balanced or unbalanced on the swing?

What kind of motion is acted on the swing by the bird?

Answer:

Explanation:

The net force on the man is the sum of all the forces acting on him. In this case, the only force acting on the man is the force of gravity, which is given by:

F = m*g

= 75 kg * 9.8 m/s^2

= 735 N

where m is the mass of the man, g is the acceleration due to gravity, and F is the force of gravity.

Since the man is motionless, the net force on him must be zero. Therefore, the tension in the cord must be equal and opposite to the force of gravity:

T = -F

= -735 N

The tension in the cord is therefore T = -735 N. The negative sign indicates that the tension is directed downward, opposite to the direction of the force of gravity.

Net Force on Man = 735 N (downward)

Tension in Cord = 735 N (upward)

Explanation: The net force on the man is equal to his weight (75 kg x 9.81 m/s2 = 735.75 N).

This force is directed downward. To keep the man in equilibrium, the tension in the cord must be equal in magnitude, but opposite in direction, so the tension is also 735.75 N, but directed upward.

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The planet that will arrive at the aphelion, or the Sun's farthest point from the Earth. a=(1.5e11+2.28e11)/2=1.89e11(m).

Kepler's Third Law

Use a3/T2=const with earth.

It will take 516 days for a spaceship to reach Mars since 1.89e11/3T is equal to 1.5e11/3365.

Because it is a fundamental human requirement, energy is crucial to our everyday activities. In addition to using we consume electricity to heat the facilities we having built, however we use it as well to cool those. For getting out of bed, you need energy.

Using a turbine generator set, electrical energy is transformed from mechanical energy to create electricity. Natural gas, coal, nuclear fission, biomass, petroleum, geothermal, and solar thermal all utilise the heat generated throughout the process to make steam.

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The force that q₂ exerts on q₁ at this new location is 1.44 µN  in  - X axis direction.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. Newton is the SI unit of force.

As electric force due to point charge is inversely proportional to the square of distance.

Given that with q₁ at the origin and q₂ initially at x₁ = 13.2 mm,  q₁ exerts a repulsive force of 2.62 µN on q₂.

Hence,  with q₁ at the origin and q₂ initially at x₁ = 17.8 mm,  q₁ exerts a repulsive force of on q₂ = 2.62 µN (13.2/17.8)²

=  1.44 µN .

So, q₂ exerts a force of  1.44 µN on q₁ at this new location in - X axis direction.

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Answer:

What is the force applied between q1 and q2?

✔ 10.8 N

In which direction does particle q2 want to go?

✔ away from particle q1, in a straight line to the right

Explanation:

Even if you are confident in your own driving skills, you have no control over outside elements such as other drivers' behavior, unfavorable road and weather conditions, or other unexpected risks.

It's best to stay 3-4 seconds behind the automobile in front of you to lessen the risk of a collision. Every driver must practice safe driving behaviors in order to reduce their chances of being involved in an accident. The "three-second rule" is a common rule that many drivers use to maintain safe following distances. It is necessary to leave three seconds of distance between your vehicle and the vehicle in front of you. The 3-second rule suggests keeping three car lengths between you and the car in front of you. This is also referred to as the distance.

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Heat travels from one end of an iron rod to the other end by conduction. The correct option is C.

The incorrect statement about heat transfer is convection can take place in a vacuum. The correct option is C.

When matter changes state, its temperature remains the same. The correct option is D.

Heat transfer is the process by which heat energy is transferred from one point t another.

Heat energy is always transferred from hotter to colder bodies.

The processes of heat transfer include:

Transfer of heat results in an increase in temperature as well as a change of state.

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Answer:

C

Explanation:

magnet poles with the same polarization reject each other.

Answer:

the answer c because they will push away from each other