a rectangular gasoline tank can hold 50kg of gasoline when full what is the depth of the tank if it is 0.5m wide by 0.9m long ?relative density of gasoline is 0.75 live the answer in centimeters [p(water)=1000kgm -3meter cube

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 the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct.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.