Emilio tries to jump to a nearby dock from a canoe that is floating in the water. instead of landing on the dock, he falls into the water beside the canoe. use newtons third law to explain why this happened. hint: first identify the action-reaction pair in this example.

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.