When a carousel is in motion, the movement of the carousel horse can best be described as
a) acceleration; change in speed.
b) velocity; speed plus direction.
c) acceleration; change in velocity.
d) speed; distance traveled over time.

I believe it would be C! But don't quote me on this. //:

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

Efficiency is an action of doing something. for example when you take a test. good efficiency means you did well but bad effeciency or no effiency means you did bad.