The diagram shows a ball resting at the top of a hill. A ball is at the top of a slope at point X. The bottom of the slope is point Y. Which statement best describes the energy in this system? The potential energy in the system is greatest at X. The kinetic energy in the system is greatest at X. Total energy in the system decreases as the ball moves from X to Y. Total energy in the system increases as the ball moves from X to Y.

What does the symbol (–hfus) indicate in a phase change?

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.