Which section (A or B) of the roller coaster shows positive acceleration? Which section (A or B) of the roller coaster shows negative acceleration?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

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

You add 800 ml of water at 20c to 800 ml of water at 80c what is the most likely final temperature of the mixture ? a. 100c b. 60c c. 25 c d.50c