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Calculate the Grash of number, the Nusselt number, the convective heat transfer coefficient (h), and the total heat transfer (Q_dot) in ambient air at Tinf = 30C for the following conjurations:
a) A vertical wall heated by sunlight to a temperature of 50C. Calculate for a single side only, the wall is 2m high and 6m long.
b) The interior of a vertical cylindrical chimney, Tw = 80C, 10m tall and 1m in diameter.
c) The four vertical sides and the top of a poorly-insulated refrigerator, 1m by 1m by 2m tall, Tw = 5C.
heat is to be conducted along a circuit board that has a copper layer on one side. the circuit board is 15 cm long and
a tank contains 0.9 m3 of helium at 200 kpa and 20 c. estimate the total mass of this gas in kga on earth andb on the
An oil company refines crude oil valued at $62/barrel and sells it to motorist as gasoline at its retail centers at a price of $2.90/US gallon (1 barrel = 42 US gallons). A supply disruption causes the price of crude oil to increase overnight to $100..
find a closed body using 3 sourcessinks the sign of the strength will determine which is which located at -0.7m 0 0 0
for flow of viscous fluids through a 5 cm diameter pipe for what flow rate in m3h would we expect transition to
compute the required diameter for a solid circular shaft if it is transmitting a maximum of 110hp at a speed of 560
water enters vertically and steadily at a rate of 35 ls into the sprinkler shown in figure q.4. the sprinkler has
a solar collector is used to dry biomass in a storage bin. outside air at 35o and 60 rh enters the collector and is
process1-2 constant temperature expansion at 600 k from p10.5mpa tp p20.4mpaprocess 2-3 polytropic expansion with n1.4
Solve the velocity distributions in the two fluids.
liquid water enters a pump at 15degc 100 kpa and exits at a pressure of 5 mpa. if the isentropic efficiency of the pump
air at 30 celcius and 2 mpa flows at steady state in a horizontal pipeline with a velocity of 25ms . it passes through
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