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GenaCL600 [577]
3 years ago
14

If an 800 kg roller coaster is at the top of its 50 m high track, it will have a potential energy pf 392,000 J and a kinetic ene

rgy of 0 J. This means the total mechanical energy is 392,000 J. If the cart drops down to where its kinetic energy is now 92,000 J, how high off the ground is the cart now?
0 m

8.27 m

38.27 m

68.27 m
Physics
1 answer:
Viefleur [7K]3 years ago
5 0
I just woke him crying crying laughing crying and laughing I’m so mad he got me blocked him lol I got a hold on her phone the answer is 0 m
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Choose the 200 kg refrigerator. Set the applied force to 400 N (to the right). Be sure friction is turned off.What is the net fo
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<span>The magnitude of the net force is 400, directed to the right.</span>
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d.

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A satellite, orbiting the earth at the equator at an altitude of 400 km, has an antenna that can be modeled as a 1.76-m-long rod
ivann1987 [24]

Answer:

The inducerd emf is 1.08 V

Solution:

As per the question:

Altitude of the satellite, H = 400 km

Length of the antenna, l = 1.76 m

Magnetic field, B = 8.0\times 10^{- 5}\ T

Now,

When a conducting rod moves in a uniform magnetic field linearly with velocity, v, then the potential difference due to its motion is given by:

e = - l(vec{v}\times \vec{B})

Here, velocity v is perpendicular to the rod

Thus

e = lvB           (1)

For the orbital velocity of the satellite at an altitude, H:

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R_{E} = 6371\ km = radius of earth

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