Physics

Problem

A natural satellite of Jupiter follows a circular orbit of radius

1.50\times10^{8}\,\text{m}

. Take

M_{\rm J}=1.90\times10^{27}\,\text{kg}

and

G=6.67\times10^{-11}\,\text{N\,m}^2\,\text{kg}^{-2}

. a. (a) Calculate the orbital speed of the satellite. b. (b) Find its orbital period in Earth hours, correct to two significant figures.