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Effectus [21]
3 years ago
14

An object is moving with the speed of light around the Earth. How much time will it take to complete one round trip along the eq

uator on the surface of earth if radius of earth is 6400km
Physics
1 answer:
dimulka [17.4K]3 years ago
8 0

Answer:

0.14 seconds

Explanation:

The speed of light in vacuum is approximately 3.0*10^8. The distance that would be covered by the object would be equivalent to the circumference of the cross-section of the earth on the equator.

Circumference = 2\pi*6400000 =4.02*10^7

Time = distance/speed = 4.2*10^7 / 3.0*10^8 =0.14s

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Samantha is refinishing her rusty wheelbarrow. She moves her sandpaper back and forth 45 times over a rusty area, each time movi
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