Physics

Problem

A satellite in a circular orbit of radius

42\,400\,\text{km}

around Earth takes

24\,\text{h}

to complete one revolution. Approximately what orbital radius is required for another satellite to have a period of

12\,\text{h}

? a)

21\,200\,\text{km}

29\,000\,\text{km}

26\,700\,\text{km}

30\,000\,\text{km}