a 100 kg cart moving at 15 m/s collides with a 50 kg cart at rest, causing both carts to move together in the same direction. If momentum is conserved at what speed are the two carts now moving?

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air