What type of reaction is being shown in this energy diagram? Energy
Reactants
Activation
Energy
Products
to
ti
Time
O A. Endothermic, because energy is released into the surroundings
B. Exothermic, because energy is released into the surroundings
C. Endothermic, because energy is absorbed from the surroundings
O D. Exothermic, because energy is absorbed from the surroundings

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

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

How can you increase the strength of an electromagnet?