3000 J of heat is added to a system while 2000 J of work is done on the system. What is the change in Internal energy

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

What is the coefficient of kinetic friction μk between the block and the tabletop?

Which bonds are found inside a water molecule