Which investigation will best test the effects of gravity on moving objects? A.
pencils falling from the same height

B.
balloons floating upward from the same height

C.
a bicycle speeding up on a flat surface

D.
a ball slowing down on a flat surface

How does a nuclear reactor produce electricity? a. high-energy gamma rays are converted by a generator into electricity. b. the heat from the reaction turns water to steam, which runs a generator. c. the reaction produces a stream of electrons that flow through wires and into batteries. d. the heat released from the reaction is used to burn coal or gas to produce electricity. e. control rods absorb the neutrons emitted and release a stream of electrons as electricity.