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Part A) Conversations with Neil Armstrong on the moon had an echo (like on Skype) of 2.56 s when Houston’s voice was picked up on Armstrong’s helmet microphone and sent back. The signals are radio waves which travel at the speed of light (3.00 × 108

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Answer #1

A) Let the distance between Moon and Earth is D

The speed of the radio waves is 3 x 10⁸ m/s

The time taken to the waves travel from Moon to Earth and back from Earth to Moon is 2.56 s

Therefore,

2D 3 x 10 x 2.56 D 3.84 x 10 m 384000 km

B) In case B, C, E the object is decelerating.

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Answer 1

A) Let the distance between Moon and Earth is D

The speed of the radio waves is 3 x 10⁸ m/s

The time taken to the waves travel from Moon to Earth and back from Earth to Moon is 2.56 s

Therefore,

2D 3 x 10 x 2.56 D 3.84 x 10 m 384000 km

B) In case B, C, E the object is decelerating.