Consider the air in the entire system (syringe, rubber hose, rubber stopper and metal can). As the air in the system reaches thermal equilibrium with the cool water, describe how each of the following changes (if at all). Wherever possible, explain your answers in terms of changes to the individual molecules of air that produces the macroscopic changes. Volume: Pressure: Temperature: Number of air molecules: Internal energy of the gas:

Why is there friction between objects

Which notation is used to represent an alpha particle? a. b. c. d.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.