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Veronika [31]
3 years ago
14

A mountain slope and a skier make up a closed system with 21,800 J J of energy. When the skier starts her descent down the mount

ain, the mechanical energy of the system is 19,500 J. By the time she reaches the bottom, the system's mechanical energy has fallen to 18,230 J. How much of the total energy is transformed into thermal energy?
A. 2,300 J
B. 3,570 J
C. 20,530 J
D. 1,270 J​
Physics
1 answer:
belka [17]3 years ago
4 0

Answer: 1,270 J

Explanation: APEX

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Planet Y has rotated by 135.5° through during this time.

To find the answer, we need to know about the relation between angle and radius of orbit.

<h3>What's the expression of angle in terms of radius?</h3>
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            angle= (orbital velocity × time)/radius

  • Orbital velocity= √(GM/radius), G= gravitational constant and M = mass of sun
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<h3>What's is the angle rotated by planet Y after 5 years, if ratio of the radius of orbit of planet X and Y is 4:3 and planet X is rotated by 88°?</h3>
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  • As time = 5 years ( a constant)
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Thus, we can conclude that Planet Y has rotated by 135.5° through during this time.

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4. T or F X-rays, ultraviolet light, and gamma rays all can travel through interplanetary space, so they are examples of waves.
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<h3>What is electromagnetic spectrum?</h3>

The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is packet of energy that travels and spreads out. It has radio waves, infrared waves, visible light waves, ultraviolet rays and microwaves.

They possess high energy even to penetrate deep within the material. The electromagnetic spectrum has longer wavelength and less frequency.

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Thus, the amplitude of water wave increases as we get farther from the disturbance.

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3 0
2 years ago
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Answer:

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Explanation:

I took physics 121 and got the same question. This is my answer that i used and my teacher said it was right.

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Answer:

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