Aspinning spherical shell with radius 30 cm and negligent mass is filled with 0.5kg of sand. it started spinning at an angular velocity of 8 m/s. all the sand starts within the center 10-cm and by the end has moved to the outermost radius. what is its new angular velocity?

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