Afamily leaves home at 1: 00 pm and arrives at their vacation spot 200 miles away at 5: 00 pm on the same day. what is their average speed?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

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

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)