Mars revolves around the Sun once in _____ days.

The time taken by Mars to revolve round the sun is 1.88 years. Find the ratio of average distance between mars and the sun to that between the earth and the sun.

Suppose that the earth revolves around the sun in a perfectly circular orbit. Does the sun do any work on the earth?

The earth revolves round the sun because the sun attracts the erth. The sun also attracts the moon and this force is about twice as large as the attraction of the earth on the mon. Why does the moon not revolve round the sun? Or does it?

The mass ratio of two planets is 1:5 . They are revolving around the sun in circular paths of radii in the ratio 2:5. The ratio between the values of acceleration due to gravity on their surface is:

Earth revolves around the sun at 30 km s^(-1) calculated the kinetic energy of the Earth.What is the total energy of the Earth in that case? Is the total energy positive?Give reasons.(Potential energy of earth = -49.84xx10^32)

The earth revolves round the sun due to gravitatinal attraction. Suppose that the sun and the earth are point particle with their existing masses and that Bhor's quantization rule for angular monentum is valid in the case of gravitation (a) Calculate the minimum radius the earth can have for its orbit. (b) What is the value of the principle quantum number n for the present radius ? Mass of the earth = 6.0 xx 10^(24) kg, mass of the sun = 2.0 xx 10^(30) kg, earth-sun distance = 1.5 xx 10^(11)m .

The ______ revolve around the nucleus.