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A body whose surface area is 0.5 m2, emissivity is 0.8, and temperature is 150C is placed in a large evacuation chamber whose walls are at 25C. What is the rate at which radiation is emitted by the surface, in W? What is the net rate at which radiation is exchanged between the surface and the chamber walls in W?
experimental values for the properties of an alloy steel have been found to be su 1480 mpa sy 1370 mpa e207gpa kic
q1 the pressure in an air tank is able to support a water column 15 meter high. find the absolute air pressure in psi
propane in a steel bottle of volume 0.1 m3 has a quality of 10 at a temperature of 15 c. use the generalized
a stream of methanol vapor is used to chill a countercurrently flowing saturated steam in an adiabatic heat exchanger.
Gate AB in fig 2 is a one-quarter circle, 5 m wide into the paper, hinged at B and resting on a smooth wall at A. Find the total horizontal force on the surface.. Find the total vertical force on the surface.
a copper-clad steel sheet is produced by hot roll bonding. the cladding separated during deep drawing. what are some
for an infiltration rate of 0.9 air changes per hour ach. a building 20m long 13m wide and 3m high is kept at 24
a simplified gear system for a mechanical watch is shown. knowing that gear a has a constant angular velocity of 1
a coil of 12 ohms is connected in parallel with another of 20 u ohms resistance the circuit is then connected in series
Calculate the force required to punch out a rectangular hole 100m x 50mm in a 2mm thick aluminium sheet. The ultimate strength in shear is 125 MN/m^2.
an engineer has proposed that a simple ideal rankine cycle that uses refrigerant-134a be used to produce work with heat
neil a. armstrong was the first person to walk on the moon. the distance between the earth and the moon is 3.85 108 m.
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