Which activity best shows work being done? An apple hanging from a tree.

A ball rolling across the ground.

A book sitting on a shelf.

A car parked in a driveway.

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?