Question

It takes 8 minutes for light to reach from the sun to the earth's surface. If the speed of light is taken tot
3 X 10%m/s, find the distance of the sun to the earth in km.
Calculate the length of a second's nendulum at a place where g=9.8 m/s2.
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Answer 1

Answer:

Given,

Speed of light = 3 * 10^8 m/s

Time taken to reach the earth = 8 min = 480 s

We know,

Distance = speed * Time

              = 3 * 10^8 * 480

              = 1440 * 10^8 m = 1440 * 10^8 / 10^3 km = 1440 *  10^5 km

              = 1.44 * 10^8 km

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Answer 2

Answer:

DISTANCE= SPEED× TIME

SO = 3×10^8×8

= 24×10^8 m

= 2.4×10^9 m

2.4 × 10^6 km

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