How can you find the radian measure of a central angle when you are given the corresponding arc length and radius?

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Which type of wave can travel without a medium