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The spectral absorptivity a? and spectral reflectivity p? for a spectrally selective, diffuse material are as shown.
(a) Sketch the spectral transmissivity t?.
(b) If solar irradiation with GS = 750 W/m2 and the spectral distribution of a blackbody at 5800 K is incident on this material, determine the fractions of the irradiation that are transmitted, reflected, and absorbed by the material.
(c) If the temperature of this material is 350 K, determine the emissivity e.
(d) Determine the net heat flux by radiation to the material.
A spring stiffness k= 500 n/m is mounted against a 10 kg block. if the block is subjected to a force of 1 KN determine the velocity of the block at s=0.3 m when s=0, the block is at rest and the spring is uncompressed. The coefficient of fricktion is..
A cylindrical specimen of a metal alloy 48.0 mm long and 9.72 mm in diameter is stressed in tension. A true stress of 368 MPa causes the specimen to plastically elongate to a length of 53.5 mm.
A paper clip is made of wire 0.7 mm in diameter. If the original material from which the wire is made is a rod 25 mm in diameter, calculate the longitudinal engineering strain and true strain that the wire has undergone during processing.
1. what are the four fundamental quantities of fluids in aerodynamics?2. what are common units used both english usgs
A fourth-order polynomial passes through the five points for which the independent and dependent variables, x and y, respectfully, are given (-2,37), (-1,7), (0,5),(1,13), and (2,61). Find the polynomial by any suitable method. Here, x represents the..
A high strength steel [E = 200 GPa] tube having an outside diameter of 80 mm and a wall thickness of 3 mm is bent into a circular curve having a 52 m radius of curvature. Determine the maximum bending stress developed in the tube
An 80-mm × 40-mm rectangular beam is made of heat treated AISI 4340. On the tension side of the beam, a transverse crack of length 10 mm is discovered. Determine the magnitude of the bending moment M that will cause brittle fracture.
consider condenser in a vapor power plant in which steam from the turbine is condensed to saturated liquid by rejecting
The tennis coach needs a better tennis ball serve for practice. This device must fire a sequence of standard tennis balls ball from one side of a standard tennis court over the net such that they land and bounce within each of three court ..
A well insulated 3-m X 4-m X 6-m room initially at 7 degrees C is heated by the radiator of a steam heating system. The radiator has a volume of 15 L and is filled with superheated vapor at 200 kPa and 200 degrees C.
1. assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
water at 15 degrees celcius flows through a nozzle that contracts from a diameter of 20cm to 2cm. the pressure at
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