A 5.9 kg bowling ball is traveling toward a wall at 34 m/s. The bowling ball bounces off the wall at a velocity of 18 m/s. If the ball is in contact with the wall for 0.65 seconds, what magnitude force was applied to the ball by the wall? Round to whole number. Help please.

Asquare isothermal chip is of width w=5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at tinf=15 °c. from reliability considerations, the chip temperature must not exceed t=85 °c. if the coolant is air and the corresponding convection coefficient is h=200 w/m2 x k, what is the maximum allowable "power" of the chip? if the coolant is a liquid for which h=3000 w/m2 x k, what is the maximum allowable power of the chip?