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A thin metal plate is insulated on the back and exposed to solar radiation on the front surface. The exposed surface of the plate has an absorptivity of 0.85 for solar radiation. (Absorptivity is the fraction of the incident radiation that is absorbed.) If solid radiation is incident on the plate at a rate of 430 W/m2 and the surrounding air temperature is 25°C, determine the surface temperature of the plate when the heat loss by convection equals the solar energy absorbed by the plate. Assume the convection heat transfer coefficient to be 45 W/m2-°C, and disregard heat loss by radiation.
a piston d50mm sits on top of a fluid s.g.11 connected to a 10mm diameter tube open to the atmosphere. a if the fluid
a cast- iron cylinder of 300mm bore carries a pressure of 30 newtons per square millimitrewhat should be its thickness
based solely on available static pressure at a fire hydrant of 51.67 psi that has an elevation of 657 feet above see
A turbine takes in 2 kg/s neon at 27C and 200 kPa with negligible velocity. The produced work is 75 kW and 30 kW of heat leaks into the turbine from the surroundings. The neon exits at 100 kPa and 230 K. Find the exit velocity of the neon.
the inner and outer surfaces of a 6-m x 7-m brick wall of thickness 41 cm and thermal conductivity .69 wmc are
calculate the transverse modulus of the peek/carbon fiber composite with 30% volume fraction by tow method. the modulus of peek is 3.8 GPa and the modulus of the carbon fiber is 400GPa. assume the reinforcing factor.
A circular shaft is subjected to a torque Ta and a bending moment Ma. Assuming that the diameter of the shaft is d, determine the expressions for the principal stresses and maximum shear stress in terms of Ma, Ta and d.
a cylinder fitted with a piston has an initial volume of 2 ft3 and contains nitrogen at 20 lbfin2 at 80 f degrees. the
a truck traveling at vo 60 mph when the driver applies the brakes to come to stop the deceleration of the truck is
determine the pumpcompressor work input leave as kjkg required to isentropically compress water in part a as a liquid
design a process to produce the following products a paper clips b steel i-beams and c copper tubing. should the
what is the sine wave generated by a phasor of length 9, rotating with an angular velocity of 325 rad/s; and with the phase angle of 0."
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