Describe how u could make Transverse wave with high amplitude and high frequency

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?