2) Engine oil at 20° C is forced over a 20-cm square plate at a velocity of 1.2 m/s. The plate is heated to a uniform temperature of 60° C. Calculate the heat lost by the plate. (20 Points) (18) 3) Oil at 150° C flows through a long, thin walled pipe of 30 mm inner diameter and 32 mm outer diameter at 0.6 m/s. The pipe is suspended in a room for which the air temperature is 20° C. Estimate the heat loss per unit length of the tube. Show all your work. (20 Points) 20 4) The space between the panes of a double-glazed window (note the windows are completely enclosed) is filled with air at I atmosphere. The window is 1.5m high and the spacing is 37.5mm. The outside temperature is-10°C and the inside temperature is 20°C. Calculate the heat transfer across the double pane window. Assume radiation is negligible. Show all of your work and units. (20 Points) Problem 9.90 S 5) A building window pane that is 1.2 m high and 0.8 m wide is separated from the ambient air by a storm window of the same height and width. The air space between the two windows is 8-1.8 cm thick. If the building and storm windows are at 40 and -5° C, respectively, what is the rate of heat loss by the free convection across the air space? Then determine the total heat transfer if there is wind blowing across the storm window at 6.5m/s. (Show all your work). (20 Points) Storm Window Tu-3″C U-65ms 1-1.8 cm b-1.2m Π Building Window T-4 C