At the closest approach, the distance between Mars and Earth is found to be 58 million km . When planets are at this closest distance, how long would it take to send a radio message from a space probe of mars to earth?
A rocket is fired vertically from the surface of Mars with a speed of 2kms^(-1) . If 20% of its initial energy is lost due to Martian atmospheric resistance, how far will the rocket go from the surface of Mars before returning to it? Mass of Mars =6.4xx10^(23)kg , radius of Mars =3395 km ,
