A horizontal spring with spring constant 150 N/m extends outward from a rigid wall. A 200 kg k g bumper car, including the mass of the occupant, hits the end of the spring at a speed of 0.50 m/s. By how much has the car’s kinetic energy changed at the instant the spring has maximum compression?
How much work does the spring do on the car from the moment of impact until the spring has maximum compression?
What is the maximum compression of the spring?

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?