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The upper surface of a 50-cm thick solid plate (k=237 W/m*K) is being cooled by water with temperature of 20 degrees Celsius. The upper and lower surfaces of the solid plate maintained at constant temperatures of 60 degrees Celsius and 120 degrees Celsius, respectively. Determine the water convection heat transfer coefficient and the water temperature gradient at the upper plate surface.
a fossil-fuel steam power plant operates at about 50 of carnot thermal efficiency. it has been suggested that the air
a 250 g 23.0-cm-diameter plastic disk is spun on an axle through its center by an electric motor. what torque must the
the electric heating systems used in many houses consist of a simple duct with electrical resistance wires. air is
a bug is on the rimof a disk of diameter 13 in that moves from rest to an angular speed of 70 revmin in 5.2 s. what is
a computer chip which contains 25 g of copper 55 g plastic cp 0.96 kjkg-k and 55 g of silicon cp 0.70 kjkg-k. the
a large storage tank contains 500000 l of milk. milk enters the tank through a 0.05 m diameter pipe at a velocity of 3
for the following epicyclic gear train below gear 2 has a radius of 12 cm gear 3 has a radius of 6 cm and gear 4 has a
if you are standing in a room that is held at a constant 75 f and your body temperature remains at a constant 98.6 f
State the sequence in which the cylinders operate on the operation of the start valve and show, with the aid of a schematic diagram, how an electronic controller could be included in the circuit to control the sequence of cylinder operations.
To Verify the law for parallelogram of forces, law for triangle of forces and law of polygon of forces. These laws are very useful to calculate unknown forces in very short time.
a centrifugal compressor used in a gas turbine engine increases the pressure of 2000 lbmmin of air from 15 psia to 150
a motorist travelingalong a straight portion of a highway is decreasing the speed of his automobile at a constant rate
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