At its closest approach, the distance between the Mars and the Earth is found to be 60 million km . When the planets are at this closest distance, the time it would take to send a radio - message from a space probe of the Mars to the Earth is

Question

At its closest approach, the distance between the Mars and the Earth is found to be 60 million km . When the planets are at this closest distance, the time it would take to send a radio - message from a space probe of the Mars to the Earth is (A) 5s (B) 200s (C) 0.2s (D) 500s

Tardigrade Admin · Accepted Answer

textt = ( textdistance/ textspeed) = (6 0 × 1 06 × 1 0 0 0 text m/3 × 1 08 textm s-1) = 2 0 0 text s

Q. At its closest approach, the distance between the Mars and the Earth is found to be $60 mi ll i o n km$ . When the planets are at this closest distance, the time it would take to send a radio - message from a space probe of the Mars to the Earth is

$5 s$

$200 s$

$0.2 s$

$500 s$

$t = \frac{distance}{speed}$
$= \frac{60 \times 1 0 ^{6} \times 1000 m}{3 \times 1 0 ^{8} m s ^{- 1}} = 200 s$

Q. At its closest approach, the distance between the Mars and the Earth is found to be 60millionkm . When the planets are at this closest distance, the time it would take to send a radio - message from a space probe of the Mars to the Earth is

5s

200s

0.2s

500s