Question

4. Distance of the moon from the earth is 4 x 108 m. The time taken by a radar signal transmitted from the earth to reach the moon is (1) 5.2 s (2) T.3s (3) 2.6 s (4) 0.70 s. A stone is dropped into a well in which the level of water is h. below the top of ད​

Answer 1

Answer:

t = 1.33 s

Explanation:

speed = distance / time

or

time = distance / speed

here,

distance between earth and moon = 4 x 10^8 m

speed of radar signal = 3 x 108 m/s [speed of light ]

so,

the time taken by radar signal to reach the moon will be

t = 4 x 10^8 / 3 x 10^8

thus,

t=1.33

Answer 2

Question-

Distance of the moon from the earth is 4 x 108 m. The time taken by a radar signal transmitted from the earth to reach the moon is (1) 5.2 s (2) T.3s (3) 2.6 s (4) 0.70 s

Answer-

The time taken by a radar signal transmittedfrom the earth to reach the moon is. 5.2 s.

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