Question

the moon is 6/10 power 8 m away from the earth.a radar signal transmitted from the earth will reach the moon is about.
(i) 6.2 second
(ii) 2.6 second
(iii) 1.3 second
(iv) 2.0 second

please help me.
please send me answer.
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Answer 1

Answer:

Distance between moon and earth, S=4×10

8

m

Speed of radar signal, c=3.08×10

8

m/s

We know,

Distance between moon and earth,

S=c×t, where t is the time taken by the radar signal to reach moon.

⇒4×10

8

=3.08×10

8

×t

or,t=

3.08×10

8

4×10

8

t=1.3s

Hence it will take 1.3 seconds for the radar signal to reach from earth to moon

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