A piece of solid copper, at 10°C, is dropped into a graduated cylinder of 100°C water. Which statement BEST describes the change in heat energy in this system?
A)
Both water and copper temperatures decrease
B)
The temperatures of both substances remain constant.
Water temperature increases, copper temperature decreases.
D)
Water temperature decreases, copper temperature increases
ustration?

List four observations that indicate that a chemical reaction may be taking place

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature