Plss help!! Find power output of a 40 kg man climbs up 8m rope with a constant velocity for 15s.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

How are elastic and inelastic collisions different? give two or more ways. your answer should have at least 2 sentences.