How fast must a 2.5-g ping-pong ball move in order to have the same kinetic energy as a 145 g baseball moving at 38.0 m/s?

Kinetic energy = (1/2)*m*v^2.  So we have (1/2)*(145 g)*(37 m/s)^2 = (1/2)*(2.5 g)*(v^2).

Solve for v = 281.78 m/s {about 630 miles per hour}

Explanation:

the results is a decrease in air temperature with an increase of altitude.

explanation: