An open pipe instrument has a fundamental frequency of 15912 If y=330m/s, calculate: 1. the length of the pipe 11. Third overtone
Mention three use of an echo

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.

The duration of a photographic flash is related to an rc time constantly