A recipe gives the instructions below. After browning the meat, pour off the fat from the pan.
To further reduce fat, use a strainer.

What type of separation methods are described in the recipe?

decantation and screening
distillation and screening
decantation and centrifugation
distillation and filtration

What is work? how much work is done to move an object 0 meters?

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.