A block of Aluminum weighing 140g is cooled from 98.4°C to 62.2°C with the release of 1080 Joules of heat. From this data, calculate the specific heat of aluminum.

Calculate the work done by an external agent during an isothermal compression of 1.00 mol of oxygen from a volume of 22.4 l at 10∘c and 1.0 atm pressure to 16.8l

If a simple machine reduces the strength of a force, what must be increased?

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)