when placed in H20 , a sodium pellet catches fire as hydrogen gas is liberated and sodium hydroxide forms

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

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.