Question

During an experiment, a signal from a spaceship reached the ground station in seven minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 × 108 m s–1

Answer 1

Answer:

speed = 3 x 10^8 ms^-1

time = 7 minutes = 7 x 60 = 420 seconds

Since dist. = time x speed

Therefore dist. = 420 x 10^8 = 4.2 x 10^10 metres

                          = 4.2 x 10^7 kilometre    

Explanation:

Answer 2

Given:

During an experiment,a signal from a spaceship reached the ground station in 5minutes and the signal travels at the speed of light which is 3×10⁸m/s.

To Find:

The distance of the spaceship from the ground station.

Solution:

Speed of the signal (v) = 3×10⁸m/s

Time taken (t) = 5 minutes = 5×60 s

Distance (s) = ?

We know,

Speed = distance/ time

i.e. v = s/t

or, s = v×t

or, s = 3×10⁸m/s × 5 × 60 s

or, s = 900 × 10⁸ m

or, s = 9 × 10¹⁰ m

Thus, The Distance of the spaceship from the ground station is 10¹⁰ m.

By Rony1001