A2.75-mm-wide gap (crack) forms between the frame and wall of a building. The wall is 186 mm thick and difference in pressure between the inside and the outside of the building is 5 Pa. take the temperature of the air as 20°C, p=18 1x 10 -6 N.s/m 2 andp=1.202 kg/ m 3 a) Determine bulk velocity of flow through the crack: b) Calculate maximum velocity of the flow across the crack:

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