What are the differences and similarities to Speed and Velocity?

Aregular polygon has angkes of size 150° each.how many side has the polygon

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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