Orbital period, T:

$\overline{){\mathbf{T}}{\mathbf{=}}{\mathbf{2}}{\mathbf{\pi}}\sqrt{\frac{{\mathbf{r}}^{\mathbf{3}}}{\mathbf{G}\mathbf{M}}}}$

Orbital speed, v:

$\overline{){\mathbf{v}}{\mathbf{=}}\sqrt{\frac{\mathbf{G}\mathbf{M}}{\mathbf{r}}}}$

An earth satellite moves in a circular orbital at a speed of 7000 m/s. What is its orbital period?

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