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mars1129 [50]
3 years ago
8

A roller coaster uses 800 000 J of energy to get to the top of the first hill. During this climb, it gains 500 000 J of potentia

l energy and pauses (velocity = 0) for a fraction of a second at the very top before heading down the other side.
a) Draw a sankey diagram for a roller coaster's climb.
Physics
1 answer:
Zarrin [17]3 years ago
6 0

Answer:

<em>Good Luck!</em>

Explanation:

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_____ is the frictional force needed to slow down an object in motion
tekilochka [14]

Answer

gravity

Explanation:

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3 years ago
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A satellite orbits the Earth in an elliptical orbit. At perigee its distance from the center of the Earth is 22500 km and its sp
aleksley [76]

Answer:

6.09294\times 10^{24}\ kg

Explanation:

K = Kinetic energy

v_p = Perigee speed = 4280 m/s

v_a = Apogee speed = 3990 m/s

r_p = Perigee Distance = 22500000 m

r_a = Apogee Distance = 24100000 m

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

M = Mass of Earth

m = Mass of satellite

In this system the kinetic and potential energies are conserved

K_p+P_p=K_a+P_a\\\Rightarrow \frac{1}{2}mv_p^2-\frac{GMm}{r_p}=\frac{1}{2}mv_a^2-\frac{GMm}{r_a}\\\Rightarrow \frac{1}{2}m(v_p^2-v_a^2)+GMm\left(\frac{1}{r_a}-\frac{1}{r_p}\right)=0\\\Rightarrow M=\frac{v_a^2-v_p^2}{2G}\times \left(\frac{1}{r_a}-\frac{1}{r_p}\right)^{-1}\\\Rightarrow M=\frac{3990^2-4280^2}{2\times 6.67\times 10^{-11}}\times \left(\frac{1}{24100000}-\frac{1}{22500000}\right)^{-1}\\\Rightarrow M=6.09294\times 10^{24}\ kg

The mass of the Earth is 6.09294\times 10^{24}\ kg

3 0
4 years ago
Two objects have the same velocity. These two objects have different masses. Which object will
kogti [31]

Answer:

The object with the greater mass will have the greater momentum

Explanation:

The momentum of an object with mass <em>m</em>, moving with velocity <em>, </em>is given by the formula

M = <em>mv</em>

<em />

Since both objects have the same velocity <em>v, </em>it is clear that the object with the bigger mass will have the greater momentum

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2 years ago
Please someone help
kari74 [83]
I can help you draw the ray diagram.
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When you put your hands on a cold object like a glass of ice water your hands become?
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<span><span>Your hand will be cold.
if you do it often enough, you will realize your fingernails will not grow as fast (Fun fact)


</span></span>
5 0
3 years ago
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