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An instrumentation package has a spherical outer surface of diameter D = mm and emissivity ε = 0.25. The package is placed in a large space simulation chamber whose walls are maintained at 77 K. If operation of the electronic components is restricted to the temperature range 40 ≤ T ≤ 85°C, what is the range of acceptable power dissipation for the package? Display your results graphically, showing also the effect of variations in the emissivity by considering values of 0.20 and 0.30.
an old-style wooden irrigation gate is opened by pulling on a steel cable that connects to the bottom of the gate. how
Air expands through a turbine operating at steady state on a test stand. At the inlet, p=50 psia, T=1500 degrees R, and at the exit , p=14.5 psi. The volume flow rate of air entering the turbine is 2000 ft^3/min, and the power developed is measured a..
The electronic components of a computer are cooled by air flowing through a fan mounted at the inlet of the electronic enclosure. At steady state, air enters at 18oC, 1 atm. For noise control, the velocity of the entering air cannot exceed 0.9 m/s. F..
steam flow rate kgs for a reheat-regenerative steam power plant which is to produce 200 mw of electricity. the turbine
a 2500 kg car traveling at 25.0 ms stops in a distance of 0.300 m after colliding with a tree. what is the acceleration
We want to transport water at a rate of Q = 56.55 m3/h from point 1 to 2 with the new commercial steel pipe shown in the figure. The pressure difference between point 1 and 2 is given as P1 - P2 = 52,800 N/m2. What should be the diameter of the pi..
a force of 67000 n is applied to a steel wire 7.5 m in length. the tensile stress in the wire must not exceed 138 mpa
three pulleys are joined by belts as shown. pulley b is a single pulley with two groves for the belts. specs for the
an air-standard otto cycle has a compression ratio of 7.5. at the beginning of compression p1 85 kpa and t1 305 k.
as a cars gas tank is filled gasoline vapors in the tank are displaced and may be emitted into the atmosphere. for this
A cantilevered beam with a rectangular cross section is loaded by a force perpendicular to the beam center line at the free end. The cross section is 100mm high and 25mm wide. The vertical load at the beam end is 40,000N.
design an experiment complete with instrumentation to determine the specific heats of a liquid using a resistance
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