A hypothetical planet has an ocean of water which is 50km deep. The top 5km is frozen as ice (i.e., 45km is water). Radius and average density of the planet are both half the respective values for the earth. There is no atmospehre. Obtain an estimate of the pressure at the bottom of the ocean.

A planet has radius ((1)/(36)) th of the radius of the earth. The escape velocity on the surface of the planet was found to be (1)/(sqrt(6)) times the escape velocity from the surface of e earth. The planet is surrounded by a thin layer of atmosphere having thickness h (ltlt radius of the planet). The average density of the atmosphere on the planet is d and cceleration due to gravity on the surface of the earth is g_(e) . Find the value of atmospheric pressure on the surface of the planet.

The escape speed from earth's surface is 11kms^(-1) . A certain planet has a radius twice that of earth but its mean density is the same as that of the earth. Find the value of the escape speed from the planet.

The escape speed from earth's surface is 11kms^(-1) . A certain planet has a radius twice that of earth but its mean density is the same as that of the earth. Find the value of the escape speed from the planet.

A man can jump up to a height of 1.5 m on the earth's surface. What should be the radius of a planet having the same average density as that of the earth so that the man can come out of the gravitational field of that planet in one jump ? Radius of the earth is 6400 km.

How will you weight the sun, i.e. estimate its mass ? You will need to know the period of one of its planets and the radius of the planetary orbit. The mean orbit radius of the earth around the sun is 1.5 xx 10^(8)km , then the mass of the sun would be calculated as