The speed of sound in air is 345 m/s. a tuning fork vibrates above the open end of a sound resonance tube. if sound waves have wavelengths 63-cm in the tube, what is the frequency (in hertz) of the tuning fork? never include units with a numerical answer.

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.

Why does lightning travel from clouds to the ground?