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A closed cylindrical air-compressor tank is 600 mm in diameter and is subjected to an internal pressure of 5 MPa. The tank walls are of steel, which has an allowable tensile stress of 110 MPa. Calculate the required wall thickness.
a cylindrical bar of radius 15 mm and length 100 mm is held at both ends. if at 30 degc no axial force exists in the
Ways to run cars on water are frequently touted on the Internet. For each of two different such proposals, write a three-page evaluation. In each evaluation, clearly state the claims made in the proposal. Then, using principles of thermodynamics, ..
Thoriated Tungsten Electrodes
a gas in a piston-cylinder device is compressed through a combination of external force on the piston and cooling in
Consider a cubic crystal with the lattice constant a.Sketch the unit cell with the crystallographic planes having Miller indices (011) and (033). What is the spacing d between these two parallel planes? Explain your answer. Include additional sketche..
A piston/cylinder system contains superheated vapor initially at 400C and 600 kPa. The system is cooled at constant pressure by exchanging heat to the surroundings until the cylinder contains only saturated liquid. The surroundings are at 25C.
1. Design a combinational logic circuit which will add two 4-bit binary numbers. 2. Minimize the expression described in the truth table of Figure P12.50, and draw the circuit.
At steady state, a heat pump driven by an electric motor maintains the interior of a building at Th=293 K. The rate of heat transfer, in kJ/h, from the building through its walls and roof is given by 8000(Th-Tc), where Tc is the outdoor temperature.
The speed of sound in air is proportional to the square root of the absolute temperature. If the speed of sound is 1126.0 ft/s when the air temperature is 68 °F (degree F), what will the speed of sound be when the air temperature is 105 °F (degree F)..
Calculate the tension T required to steadily pull the cable over a roller support on the utility pole. Neglect the effects of friction at the support. The cable, which is horizontal at A, has a mass of 3 kg /m. Also determine the length of cable f..
the wall of a heat exchanger receives a variable heat flux as shown in the figure. the heat flux is q dot of second
If we add an impurity that increases the density of electrons (the number per cubic meter) in the conduction band tenfold, what will be the density of holes in the valence band?
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