A particle on a spring moves in simple harmonic motion along the x-axis between turning points at x_1= 100x 1 =100 cm and x_2 = 140x 2 =140 cm. At which position does it have maximum acceleration?

Which changes of state do the labels represent? a: b: c:

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

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