Which scientist first showed a clear connection between mechanical energy and heat?
a)robert mayer
b)james prescott joule
c)benjamin thompson (count rumford)
d)william thomson (lord kelvin)

James Prescott Joule first showed a clear connection between mechanical energy and heat

In short, Your Answer would be Option B

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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.