If a person is in front of a smooth surface from which a sound is reflected, the person would hear a sound that
a. seems to come from behind the surface.
b. has a higher intensity than the sound produced by the source.
c. has a higher pitch than the sound produced by the source.
d. seems to lack overtones.

a. seems to come from behind the surface

If a person is in front of a smooth surface from which a sound is reflected, the person would hear a sound that
NOT:
b. has a higher intensity than the sound produced by the source.
c. has a higher pitch than the sound produced by the source.
d. seems to lack overtones. 

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.