A 6.7 kg bowling ball is lifted 2.4 m into a storage rack. The acceleration of gravity is 9.8 m/s 2 . Calculate the increase in the ball’s potential energy.

A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?

A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping. the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?

What is the frequency if a wave that pases a given pount 22 times in 2 seconds