A spring has a natural length of 10 cm. If a 23-N force is required to keep it stretched to a length of 39 cm, how much work is required to stretch it from 10 cm to 22 cm

The density of a liquid could be found by using

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

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”