When changing a topside canister filter, you should always: Wear the proper PPE and use a socket wrench to tighten the filter in place
Inspect the gasket to make sure it didn't get pinched and rev the vehicle for 5 minutes.
Use the correct tools, replace the o-ring gasket, and use a torque wrench to tighten the filter in place.
Infect the gasket to make sure it didn't get pinched and wipe down the oil filter during the zoom
process.

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.