A 50.0 kg child is riding in a 120.0 kg bumper car at an amusement park. The child drives the
bumper car at 4.5 m/s head-on into the wall of the ride and rebounds at the speed. What is the
magnitude of the change in momentum of the child in the bumper car?

How are momentum and impulse related? impulse is a whim to do something, while momentum keeps it going impulse is another name fore instantaneous momentum the impulse acting on and object is equal to the change of momentum it causes. the impulse that acts on and object is the momentum that results.

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?