Air flows in a circular cross-section duct with a velocity of 50 ft/s and a pressure of 85 psia at a section where the diameter is 4 in. At a downstream section, where the diameter has increased to 8 in. the pressure is 45 psia. (a) Assuming the flow to be isothermal, compute the heat transfer between the locations 0 (b) What is the amount of work done

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

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.

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