Calculate the mass of a bird flying through the sky. The bird has the kinetic energy of 5.6 J and is flying at a velocity of 15 m/s.

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.