Juan and Billy hooked a science book on the end of this spring scale. What is the force of gravity pulling down on the books? A) 23 grams B) 2300 grams C) 23 Newtons D) You cannot determine the force of gravity. Elimina

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings

Which of the following is another term for a planned economy