A ball of mass 4.0 kg moving with an initial velocity of 2.0 meters per second to the right collides elastically with another ball of mass 6.0 kg moving within velocity of 4.0 meters per second to the left after the Collision the first ball is moving with a velocity of 5.2 m/s to the left. What is the velocity of the second ball after the collision?

The momentum of a man riding his bicycle downhill can be calculated. the bicycle and the man have a combined mass of 40 kg. the velocity of the bicycle is 10 m/s. calculate the momentum.

Make a drawing of the electric field lines around a positive charge, then make a second drawing of the electric field lines around a negative charge.

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.