A train passes through a station without slowing down. A 560 Hz tone in the station warns people on the platform that the train is not stopping. If the people on the train hear the tone at 588 Hz, how fast is the train moving?

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

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.

To a of 4 x hz is 1. 0. mm nm nm