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A square duct, 30 cm x 30 cm, is maintained at a constant temperature of 30 °C. An airstream of 50 °C and 1 atm is forced across it with a velocity of 6 m/s.
a. Calculate the heat gained by the duct in W/m.
b. How much would the heat flow be reduced if the flow velocity were reduced in half?
Important information about Multipal choice question on mechanics, A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
a 10 cm2 plate has an electric heater installed that produces a constant heat flux. saturated liquid water at 10 degc
Two slender rods of negligible weight are pin-connected at A and attached to the 18-lb block B and the 80-lb block C. The coefficient of static friction is 0.55 between all surfaces of contact. Determine the range of values of P for which equilibr..
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the elevation change available at the grand coulee dam is 330 feet. what is the maximum possible power per unit mass
an ideal rankine cycle produces 100 MW of power. If the steam enters the turbine at 100 bar and 500C and is condensed at 1 bar, determine the flow rate of stream and the thermal efficiency.
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air at a pressure of 200 kpa and free stream temperature of 27 degc flows over a square plate at a velocity of 30 ms.
The school cafeteria has found that they go through 9 sandwiches for every 6 tickets they sell to the students. Today they have 558 sandwiches available. How many lunch tickets can they sell today?
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