A planet's year is 11 times the earth's year. Calculate the distance of this planet from the sun if the distance of the earth is `1.50xx10^8`km from the sun.

A saturn year is 29.3 times the earth year. How far is the saturn from the sun if the earth's 1.5 xx 10^8 km away from the sun.

A man stands on vertical tower of height 20m. Calculate the distance upto which he will be able to see the surface of the earth. Given radiur of earth is 6.4xx10^3km .

The distance of the point P(-6,8) from the origin is a)2 b)5 c)10 d) sqrt2

A rocket is fired from the earth towards the sun. At what distance form the earth's centre is the gravitational force on the rocket zero? Mass of the sun = 2 xx 10^20 kg and mass of earth = 6 xx 10^24 kg and orbital radius 1.5 xx 10^-8 km.

If earth be at half of its present distance from the sun, how many days will there be in a year?

The focal lenghts of objectives and eyepiece of a telescope are 200cm and 10 cm respectively. Is is used to get an image of the Sun on a screen placed 40cm behind the eyepiece. The diameter of the image is 6cm. What is the diameter of the Sun? Give the distance from earth to the Sun is 1.5xx10^(11)m .

The radius of the Moon is frac(1)(4)^th the radius of the earth and its mass is frac(1)(96)^th the mass of the earth. If the escape velocity from the surface of the earth is 11.2k ms^(-1) , find the escape velocity from the surface of the Moon.