In 2004 olympics, shawn crawford ran 200m in 19.79 sec .justin gatlin ran the 100 m race in 9.85 seconds. a) calculate their speeds (round to two decimal places) b) whose speed was faster and by how much

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