A load of 80N applied to a spring of length 40cm extends it by 20mm. asuuming that the proportional limit is not exceeded. calculate: a) the force constant of the spring
b) the length of the spring when a load of 40N is applied
c) the potential energy stored in the spring when the extension is 20mm.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

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

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2