A 10 kg cart is moving across a frictionless floor at 2.0 m/s. A 40 kg boy, riding in the cart, jumps off so that he hits the floor with zero velocity. a. What impulse did the boy give to the cart?
b. Wat was the velocity of the cart after the boy jumped out?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy? use specific examples from the lab to support your answer. (5 points)