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scZoUnD [109]
2 years ago
10

A ski jumper starts at the top of a 400m high hill before skiing down to the bottom. If the ski jumper has a mass of 75kg how mu

ch potential energy would they have at the beginning of the their motion?
A. 3920 J
B. 30,000 J
C. 735 J
D. 294,000 J
Physics
1 answer:
alekssr [168]2 years ago
6 0

Answer:B. 30,000 J

Explanation:

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3 years ago
Two plane mirrors are separated by 120°, as the drawing illustrates. If a ray strikes mirror M1 at a θ1 = 64° angle of incidence
tino4ka555 [31]

Angle, θ2 at which the light leaves mirror 2 is 56°

<u>Explanation:</u>

Given-

θ1 = 64°

So, α will also be 64°

According to the figure:

α + β = 90°

So,

β = 90° - α

  = 90° - 64°

  = 26°

β + γ + 120° = 180°

γ = 180° - 120° - β

γ = 180° - 120° - 26°

γ = 34°

γ + δ = 90°

δ = 90° - γ

δ = 90° - 34°

δ = 56°

According to the law of reflection,

angle of incidence = angle of reflection

θ2 = δ = 56°

Therefore, angle θ2 at which the light leaves mirror 2 is 56°

8 0
3 years ago
The people in a location in Florida mainly grow crops which need a lot of water. Which of these statements about the location be
Arisa [49]
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3 years ago
Read 2 more answers
A motor produces less mechanical energy than the energy it uses because the motor?
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<span>A motor produces less mechanical energy than the energy it uses because the motor looses some energy to heat.</span>
3 0
3 years ago
What will occur when the waves peak at the same place at the same time?
dedylja [7]
Hello!

This is a matter of superposition.
When the waves peak at the same time and place, they produce constructive interference, meaning the waves interact together in a positive way, to make a wave with Amplitude of both waves added together. When the peaks differ however, at the same time and place, then it is destructive interference and the waves essentially cancel each other out.

Hope this helps. Any questions please just ask. Thank you kindly.
5 0
3 years ago
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