Asked by Jill

The Earth rotates once every 24 hours. What is the angular speed of a point on the Earth's surface in rad/min. Give your answer to five decimal places. Use 3.14 for pi. (example units: m/s, mi/h)
Answered by Steve
2pi covered in 24 hours = 2pi/24 = pi/12 rad/hour

pi/720 rad/min
Answered by Maria
A laser pulse takes 2.56 seconds to travel from Earth to the Moon and return. Use this to calculate how far away the Moon is.
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