Answer:
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While rotating around Earth the Moon also rotates around it's axis. These two rotations have almost same duration (27.3 and 27 days respectively). This is the reason why we always see the same side of Moon.
The dark part of a Moon is the part where there is night on the Moon, meaning there is no sunlight visible. This dark part depends on the Moon's position relative to Earth and Sun. The change in size is due to part of Moon-day. Dark part of Moon has night, bright part has day and the boundary has either sunrise or sunset.
Martha's power is 1,300 W and is denoted as option A.
<h3>What is Power?</h3>
This is defined as the amount of energy used or transferred per unit time and the S.I unit is Watts.
Power = Work/ time
Work = force × distance
= F = ma = 75kg× 10m/s² = 750N
Work = 750N × 4m = 3000J
Power = work/time = 3000J/ 2.3s ≈ 1300W
Read more about Power here brainly.com/question/1634438
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