Determine the speeds in the following scenario, John drives 50 km/h for one hour and 100 km/h for one hour.
instantaneous speed each hour:
average speed for the two hours:

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

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

The solid that is formed and usually sinks to the bottom of a solution is the