Consider an aluminum soda can that is at 2 cand is taken out of a refrigerator. it was placed on an insulated surface in the room that was at 27 c with h = 7.00 w/m²k. how long will take the can to reach to 15 c? the can is 10 cm high and is of 6 cm diameter. ignore thermal radiation.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.