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

When a resistor with resistance r is connected to a 1.50-v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) what power does the resistor consume if it is connected to a 12.6-v car battery? assume that r remains constant when the power consumption changes.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j