Two elevators, A and B, move at a constant speed. Elevator B moves with twice the speed of elevator A. Elevator B weighs twice as much as elevator ?A. Compared to the power needed to lift elevator A, the power to lift elevator B is

In a system, when potential energy decreases, then entropy also decreases. true false

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.