Awhat occurs when light changes direction after colliding with particles of matter

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.