Water stored in dams falls freely with the force to make a turbine move. The turbine moves and produces electricity. This electric energy is supplied to homes. At home, we use electricity for heating, cooling, and lighting.
electrical energy
light energy
potential energy
kinetic energy

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

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