Answer:
the height of the is 6 m.
Explanation:
Given;
potential energy of the object, P.E = 50 J
Height of fall of the object, H = 12 m
Determine the mass of the object, m
P.E = mgh
m = (P.E) / (gh)
m = (50) / (9.8 x 12)
m = 0.425 kg
Let the height of the object at 25 J = h₂
mgh₂ = 25
h₂ = (25) / (mg)
h₂ = (25) / (0.425 x 9.8)
h₂ = 6 m
Therefore, the height of the object at 25 J is 6 m.
Which is an example of a projectile?
An arrow stored in a quiver
A trapeze artist hanging from a swing
A bullet loaded into a gun's chamber
A child jumping off of a swing set
Answer: A child jumping off of a swing set
Explanation: A projectile is any object thrown into the air, so the child is the only thing in the air thats moving.
PLEASE HELPPPPP I WILL GIVE POINTS AND BRAINIEST
Answer:
Graph A
Explanation:
I hope this is right
Two beakers are at the same temperature. One beaker has more water than the other. Which one contains more heat? Explain why.
Answer:
I would say the beaker with less water.
Explanation:
I was say this because while they are the same temperature the beaker with more water still has to fluctuate the heat or cold. They do this at the same speed but since there is less water in one beaker it finishes faster where as the beaker with more water will finish later.
Use the drop-down menus to identify the part of the ear that performs each function.
Changes sounds to signals that the brain can understand: (Inner ear, middle ear, or outer ear)
Collects sound: (Inner ear, middle ear, or outer ear)
Passes sounds through vibrations: (Inner ear, middle ear, or outer ear)
Answer:
The answers to this question is:
1. inner ear
2. outer ear
3. middle ear
Explanation:
Hope that helps!
Answer:
inner, outer, middle
Explanation:
Raven, Omega, and Red Knight are trying to earn battle stars in physics class by solving energy problems. All three have the same mass. Raven runs up the stairs in 4 seconds, Omega skips up the stairs in 6 seconds, and Red Knight walks up the stairs in 15 seconds. Which skin has the greatest power?
a) red knight
b) they're all the same
c)raven
d)omega
Which image shows a situation where conduction occurs?
A box full of pieces of metal.
A woman holds a steaming mug.
A woman holds a frying pan above a stove while stirring.
Answer: A woman holds a steaming mug
Explanation:
Just did it
The resistivity of a given wire of cross sectional area 0.7mm^2 is 4.9×10^-4ohms mm.Calculate the resistance of a 2ohms length of the wire
Answer:
the resistance of the wire is 1.4 x 10⁻³ ohms.
Explanation:
Given;
resistivity of the wire, ρ = 4.9 x 10⁻⁴ ohms.mm
cross sectional area of the wire, A = 0.7 mm²
length of wire, L = 2 mm
The resistance of the wire is calculated as follows;
[tex]R = \frac{\rho L}{A} \\\\R = \frac{4.9 \times 10^{-4} \times 2}{0.7} \\\\R = 1.4\times 10^{-3} \ ohms[/tex]
Therefore, the resistance of the wire is 1.4 x 10⁻³ ohms.
When a pot of water sits on a hot stove the metal is He did and then transferred into heat to the world of student claims that conduction is the only type feet transfer occurring which statement explains why the students idea is incorrect
Answer:
Hello your question is poorly written hence I will just give the difference between conduction and convection
answer :
Conduction occurs when there is direct contact between solids and source of heat. while convection occurs when there is transfer of thermal energy due to movement of liquid or gas
Explanation:
when a pot of water is placed on a hot stove the pot is heated through conduction because the metal pot is in direct conduct with the heat from the stove ( which is the primary source of heat in this scenerio ).
while the heat transfer from the hot pot to the water is executed through convection this is because heat transfer via convection requires the movement of liquid or gas. as the warmer liquid moves over to the top the cooler liquid goes below inside the pot that way the whole liquid becomes warm .
I need help again!!!!!! Due today!!!! NO LINK PLEASE
Answer:
The Acceleration of the object = 6.4 m/s²
Explanation:
Mass of block (m) = 5 kg
Action force on block, (F₁) = 40 N
To Find:
Acceleration of the object (a) = ?
Required solution:
Frictional force opposing the motion (F₂) = 8 N
Here in this question we have to find Acceleration of the object. So, firstly we have to find Net force of block after that we will find Acceleration of the object on the basis of conditions given above
⇒ Net force = Action force on block - Opposing friction force
⇒ F = F₁ - F₂
⇒ F = 40 - 8
⇒ F = 32 N
Now, we have to two elements that used in formula, Net force and Mass of block.
Net force of the block (F) = 32 N
Mass of block (m) = 5 kg
And we have to find Acceleration of the object.
We can find Acceleration of the object by using the Second law of Newton which says F = ma
Here,
F is the Force in N.
m is the Mass in kg.
a is the Acceleration in m/s².
So let's find Acceleration (a) !
† From second law of Newton
⇛ F = ma
⇛ a = F/m
⇛ a = 32/5
⇛ a = 6.4 m/s²
The part of the lithosphere under the ocean are less dense then those under the continents. True or false
Answer:
False
Explanation:
The outer part of the Earth that is hard and solid is termed as lithosphere. It is the outermost part of the Earth's surface. The lithosphere covered under the oceans is the oceanic lithosphere while the lithosphere comprising the continental area is the continental lithosphere. Oceanic lithosphere is denser than the continental lithosphere because of the thin layer of the Earth that exists under the oceans.
In asexual reproduction the new plant is identical to its parent.
true
false
Answer:
YES
Explanation:
Asexual means the plant is identical to the parent
Answer:
true
Explanation: Asexual reproduction produces plants that are genetically identical to the parent plant because no mixing of male and female gametes takes place.
Suppose you have a 34.9 m length of copper wire. If the wire is wrapped into a solenoid 0.240 m long and having a radius of 0.0510 m, how strong is the resulting magnetic field in its center when the current is 11.0 A?
Answer:
the strength of the magnetic field inside the solenoid is 6.278 x 10⁻³ T.
Explanation:
Given;
length of the wire, = 34.9 m
length of solenoid, L = 0.24 m
radius of the solenoid, r = 0.051 m
current in the solenoid, I = 11.0 A
The number of turns of the wire is calculated as follow;
[tex]N = \frac{34.9}{2\pi \times 0.051} = 109 \ turns[/tex]
The strength of the magnetic field inside the solenoid is calculated as follows;
[tex]B = \mu_0 (\frac{N}{L} )I\\\\B = 4\pi \times 10^{-7} \times (\frac{109}{0.24} )\times 11.0 \\\\B = 6.278 \times 10^{-3} \ T[/tex]
Therefore, the strength of the magnetic field inside the solenoid is 6.278 x 10⁻³ T.
plz help me
Your friend has a mass of 70 kg and is running at a velocity of 3 m/s. What is their kinetic energy?
Answer:
TINAAA
Explanation:
26. A liquid with a low viscosity
a. has a definite shape
b. fills its container
c. flows quickly
d. flows slowly
Answer:
flows quickly and needs to be like paper
Answer:
c
Explanation:
it flows very quickly since it has a low viscosity
What is the density of a substance of volume 3 m3and mass 9 kg?
Answer:
Density = 3 kg/m³
Explanation:
Given the following data;
Volume = 3m³
Mass = 9 kg
To find the density;
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the formula;
[tex]Density = \frac{mass}{volume}[/tex]
Substituting into the formula, we have;
[tex]Density = \frac{9}{3}[/tex]
Density = 3 kg/m³
Hurricanes are powered by heat energy in the atmosphere and the ocean. Typically, one hurricane uses an amount of heat roughly equal to Z thousand atomic bombs. If the excess heat built up in Earth's atmosphere since 1850 went into producing hurricanes, about how many more hurricanes might we expect in the world every year?
Answer:
In an year about 6 major hurricanes and 3 minor storms occurs.
Explanation:
Hurricanes are increasing in number and frequency to the increasing impact of global warming. As current research states that climate change in the tropics results in an increased storm frequency. The presence of extra heat in the air or the oceans form the stoma that leads to the production of such energy. According to o the 200-2007 data shows in the huge increase in the storm frequency and this suggests the impact of climate warming.Determina la fuerza de acción que se presenta entre dos cuerpo cuyas masas son 500 Kg y 900 Kg, si ambos cuerpos se encuentran separados a una distancia de 2 m. Datos Fórmula Sustitución y Operaciones Resultado
Answer:
F = 7.50 10⁻⁶ N
Explanation:
The force of attraction between two bodies is given by the law of universal gravitation
F = [tex]G \frac{m_1m_2}{r^2}[/tex]
where m₁ and m₂ are the masses of the hides, r the distance that separates them and G the constant of attraction that is worth 6.67 10⁻¹¹ N m²/kg²
let's calculate
F = 6.67 10⁻¹¹ 500 900/2²
F = 7.50 10⁻⁶ N
If the reference point changes, the ______ of position changes, but the actual position does not change
Answer:
Description.
Explanation:
Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.
This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.
Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.
A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.
For example, a point on a map is considered to be a reference point because it represents the starting point of an object or person in motion.
Hence, if the reference point changes, the description of position changes, but the actual position does not change.
You and a friend each apply 500 N of force to move a cement block 50 cm. How much work was done on the cement block?
Answer:
W = 500 J
Explanation:
Work is defined by
W = F . x
if we develop the dot product
W = F x cos θ
where is the angle between the force and the displacement, in this case the angle is zero, so cos 0 = 1
W = F x
indicate that each person applies a force of 500 N, so the total force is
F = 1000 N
let's reduce the distance to the SI system
x = 50 cm = 0.50 m
let's calculate
W = 1000 0.50
W = 500 J
What’s your pets name if you have one if not what’s a pet that you do want for brainliest :]
Answer:
I do have a pet
Explanation:
his name is shadow and he's a cat
Please help /Show work
If a motorcycle, a car, and a big rig are all moving with a velocity of 100 km/h, which vehicle has the greatest momentum? A motorcycle and rider. A small car. A large 18 wheeler truck.
Answer:
The big rig.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = mass * velocity [/tex]
In this scenario, a motorcycle, a car, and a big rig are all moving with a velocity of 100 km/h. Thus, the vehicle which has the greatest momentum is the big rig because its mass is intuitively or logically greater than that of the other vehicle.
Generally, momentum is directly proportional to the mass of a physical object or body.
Answer: A large 18 wheeler truck.
Explanation: Momentum is the measure of the motion of an object found by multiplying the object’s mass and velocity. Momentum is directly proportional to the object's mass and also its velocity. So, the greater an object's mass or the greater its velocity, the greater its momentum. Therefore, since the truck is bigger, it has the greatest mass. This means that the truck the greatest momentum. Correct on Edg 2020.
PLEASE GIVE BRAINLIEST AND RATE MY ANSWER :)
What is the difference between the law of gravity and the theory of gravity?
Answer:
In the language of science, a theory is an explanation of why and how things happen. For gravity, we use Einstein's Theory of General Relativity to explain why things fall. ...While laws rarely change, theories change frequently as new evidence is discoevered.
638 nm light passes through a single
slit. The third (m = 3) diffraction
minimum occurs at an angle of 5.48º.
What is the width of the slit?
which class question is this
Answer:
2.00
Explanation:
Move the sinθ to the right.
A roller coaster car is traveling at a constant 3 m/s when it reaches a downward slope. On the slope, the car accelerates at a constant rate of 4.5 m/s 2 . The length of the slope is 45 meters. A) Find the velocity of the car at the bottom of the hill. B) Find the time of travel.
Answer:
Velocity of the car at the bottom of the slope: approximately [tex]20.3\; \rm m \cdot s^{-2}[/tex].
It would take approximately [tex]3.9\; \rm s[/tex] for the car to travel from the top of the slope to the bottom.
Explanation:
The time of the travel needs to be found. Hence, make use of the SUVAT equation that does not include time.
Let [tex]v[/tex] denote the final velocity of the car. Let [tex]u[/tex] denote the initial velocity of the car.Let [tex]a[/tex] denote the acceleration of the car. Let [tex]x[/tex] denote the distance that this car travelled.[tex]v^2 - u^2 = 2\, a\cdot x[/tex].
Given:
[tex]u = 3\; \rm m \cdot s^{-1}[/tex].[tex]a = 4.5\; \rm m \cdot s^{-2}[/tex].[tex]x = 45\; \rm m[/tex].Rearrange the equation [tex]v^2 - u^2 = 2\, a\cdot x[/tex] and solve for [tex]v[/tex]:
[tex]\begin{aligned}v &= \sqrt{2\, a \cdot x + u^2} \\ &= \sqrt{2 \times 4.5\; \rm m \cdot s^{-2} \times 45\; \rm m + \left(3\; \rm m \cdot s^{-1}\right)^{2}} \\ &\approx 20.3\; \rm m \cdot s^{-1}\end{aligned}[/tex].
Calculate the time required for reaching this speed from [tex]u = 3\; \rm m \cdot s^{-1}[/tex] at [tex]a = 4.5\; \rm m \cdot s^{-2}[/tex]:
[tex]\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{20.3\; \rm m \cdot s^{-1} - 3\; \rm m \cdot s^{-1}}{4.5\; \rm m \cdot s^{-2}} \approx 3.9\; \rm m \cdot s^{-1}\end{aligned}[/tex].
Two thin lenses of power +3.5 D and -2.5 D are placed in contact,
find the power and focal length of the lens combination.
Answer:
P = 1 D
f = 1 m = 100 cm
Explanation:
The power of the combination of lenses is simply found out by adding the power of the individual lens:
[tex]P = P_{1}+P_{2}[/tex]
where,
P = Power of combination of lenses = ?
P₁ = Power of first lens = 3.5 D
P₂ = Power of second lens = -2.5 D
Therefore,
[tex]P = 3.5\ D - 2.5\ D[/tex]
P = 1 D
Now, for focal length:
[tex]Focal\ Length = f = \frac{1}{D}\\\\f = \frac{1}{1\ D}[/tex]
f = 1 m = 100 cm
Pendulum In this task, you’ll make a pendulum and analyze its swing. a hand holding a swinging pendulum shown in three positions Estimated time to complete: 20 minutes You will need these materials: goggles golf ball (or similar size ball) plastic sandwich bag tape hole punch or scissors 1 foot of string metal lid or pan Stay safe! Always wear your safety goggles. Part A Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that’s above the ball. Slip an end of the string through the hole, and tie a knot. This is your pendulum. Hold the loose end of the string still with one hand. With the other hand, raise the ball in an arc so that it’s almost level with the hand holding the string. With the string taut, let the ball go. What do you observe? Font Sizes Characters used: 0 / 15000 Part B Why did the pendulum stop swinging? Where did the energy go? Font Sizes Characters used: 0 / 15000 Part C Scientists have organized all forms of energy into two types—kinetic and potential. Kinetic energy is the energy of motion, and potential energy is stored energy. At the top of its swing, does the pendulum have kinetic or potential energy? Font Sizes Characters used: 0 / 15000 Part D At the bottom of its swing, does the pendulum have kinetic or potential energy? Font Sizes Characters used: 0 / 15000 Part E Think about the process of raising the pendulum to one side and letting it go. For this event, create a list of each form of energy associated with the pendulum as it cycles. Font Sizes Characters used: 0 / 15000 Part F How could you give the pendulum more energy? Font Sizes Characters used: 0 / 15000 Part G Now raise the pendulum and let it hit a metal lid or pan. When the ball strikes the lid, what forms of energy can you identify?
Answer:
A: Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that’s above the ball. Slip an end of the string through the hole, and tie a knot. This is your pendulum. Hold the loose end of the string still with one hand. With the other hand, raise the ball in an arc so that it’s almost level with the hand holding the string. With the string taut, let the ball go. What do you observe?
Mine was swaying perfectly fine. after a little bit it gradually started swinging slower until stopped.
B: Why did the pendulum stop swinging? Where did the energy go?
gravity was pulling it towards the ground, however the weight and momentum of the ball helped it keep swinging for a good while.
C: Scientists have organized all forms of energy into two types—kinetic and potential. Kinetic [THE ENERGY OF MOTION IN A BODY] energy is the energy of motion, and potential energy [THE STORED ENERGY IN AN OBJECT] is stored energy. At the top of its swing, does the pendulum have kinetic or potential energy?
when its at the very top of the swing it does have a very small amount of time until it starts going back down again but during that time it is potential energy
D: At the bottom of its swing, does the pendulum have kinetic or potential energy?
the pendulum still has kinetic energy when it is the closest to the ground since it is still swinging
E: Think about the process of raising the pendulum to one side and letting it go. For this event, create a list of each form of energy associated with the pendulum as it cycles.
when its in my hand: potential energy
when it starts swinging: kinetic energy
when its going upwards: kinetic energy
when it stops swinging: potential energy
F: How could you give the pendulum more energy?
one way you could possibly make it have more energy is if you make the string longer
G: Now raise the pendulum and let it hit a metal lid or pan. When the ball strikes the lid, what forms of energy can you identify?
I could hear sound energy when the two made contact but for the most part it was kinetic energy
Answer:
I could hear sound energy when the two made contact but for the most part it was kinetic energy
Explanation:
thuli wants to buy tv for R8500.a bank offers to loan her the money at an interest rate of 5%.she decides to pay the tv off in 3 years calculate the simple interest she will have to pay .also calculate the total she will pay
Answer:
The total she has to pay is R8500 plus the 5% interest.
PLEASE ADD BRAINEEST
Directions: Read each statement and determine if it is describing speed or
velocity. Write your answer on the space provided before the number.
1. Jackson ran 5k in 24 minutes.
2. A storm is travelling 25 km/hour eastward.
3. John walked 420 m in 17.5 seconds.
4. Zart moved the desk 34 cm to the left.
5. A hurricane travels 360 km in 15 hours.
6. Meredith runs 400 meters in 50 seconds.
7. Stephen Jay swims 110 m towards the shore in 72 seconds.
8. Vince throws a baseball 38 m from third base to first base in 1.7 seconds.
Answer:
Find answers below.
Explanation:
Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.
Mathematically, velocity is given by the equation;
[tex]Velocity = \frac{distance}{time}[/tex]
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the formula;
[tex]Speed = \frac{distance}{time}[/tex]
1. Speed: Jackson ran 5k in 24 minutes.
2. Velocity: A storm is travelling 25 km/hour eastward.
3. Speed: John walked 420 m in 17.5 seconds.
4. Velocity: Zart moved the desk 34 cm to the left.
5. Speed: A hurricane travels 360 km in 15 hours.
6. Speed: Meredith runs 400 meters in 50 seconds.
7. Velocity: Stephen Jay swims 110 m towards the shore in 72 seconds.
8. Velocity: Vince throws a baseball 38 m from third base to first base in 1.7 seconds.
how much water makes up earth in percentages? thx?
Answer:
71%
Explanation: