The magnitude of the gravitational force, F, between the two planets of masses mị and m2 with centres at distane x apart is given by F = G". where G is a constant. a. By using dimension analysis, find the dimensions of G. b. The life time, t, of a planet depends on the its mass, m, its initial radius, R, and the constant G and dimensionless constant, K, so that t = mªG®R°. where a, ß, y are constants. Find the values of a, ß and y.
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