A student rubs a glass rod with a piece of silk to charge it. He then touches it to a metal sphere hung from a string. Which statement correctly describes what
happens?
a) The metal sphere will be attracted to the glass rod after it is touched.
b) The metal sphere will be repelled by the glass rod after it is touched.
c) The metal sphere will have a negative charge after the glass rod touches it.
d) The metal sphere becomes neutral once the glass rod is removed.

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.

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