Solve the Problem $250 \mathrm {~km}$ Above the Earth's Surface $\mathrm { a } =$

Multiple Choice

Solve the problem.
-A space shuttle is in a circular orbit $250 \mathrm {~km}$ above the Earth's surface. Use Kepler's third law (with $\mathrm { a } =$ Earth's radius $+ 250 \mathrm {~km} )$ to find the orbital period of the satellite. $\left( \mathrm { G } = 6.67 \times 10 ^ { - 11 } \mathrm { Nm } ^ { 2 } \mathrm {~kg} ^ { - 2 } \right.$ , $\mathrm { M } = 5.97 \times 10 ^ { 24 } \mathrm {~kg}$ and Earth's radius is $6.37 \times 10 ^ { 6 } \mathrm {~m}$ ) .

A) T = 90 min
B) T = 9 min
C) T = 1 hr
D) T = 2 hr