PLS HELP ME BEFORE THE DUE DATE A lever does 765 J of work and the person using the lever applies 900 J of work. What is the efficiency of the lever?

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

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 diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island