The planet Mars has two moons, Phobos and Delmos. Phobos has a period of \(7\) hours, \(39\) minutes and an orbital radius of km. The mass of mars is:
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You are given the following data: g = 9.81 , m, the distance to the moon, R = m and the time period of the moon’s revolution is 27.3 days. Mass of the Earth in two different ways is:
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A \(400\) kg satellite is in a circular orbit of radius \(2R_E\) (where \(R_E\) is the radius of the earth) about the Earth. How much energy is required to transfer it to a circular orbit of radius \(4R_E\)\(?\) (Given \(R_E=6.4\times10^{6}\) m)
1. \(3.13\times10^{9}\) J
2. \(3.13\times10^{10}\) J
3. \(4.13\times10^{9}\) J
4. \(4.13\times10^{8}\) J
A 400 kg satellite is in a circular orbit of radius about the Earth. What are the changes in the kinetic and potential energies respectively to transfer it to a circular orbit of radius (where is the radius of the earth)
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