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A spherical steel tank, 15 m in diameter, is to hold gas at a pressure of 275 kPa. The joints are butt welded with an efficiency of 75%. The allowable tensile stress for the steel plate is 125 MPa. Calculate the required thickness of the walls.
A 10-hp, 230-V shunt-wound motor has a rated speed of 1,000 r/min and full-load efficiency of 86 percent. Armature-circuit resistance is 0.26 Q; field-circuit resistance is 225 Q. If this motor is operating under rated load and the field flux is v..
A cube of wood having an edge dimension of 20.0 cm and a density of 650 kg/m3 floats on water.
a lecture hall having a volume of 106 ft3 contains air at 808f 1 atm and a humidity ratio of 0.01 lb of water vapor per
Air is expanded isentropic ally in a horizontal nozzle from an initial pressure of 1.0 MPa, of a temperature of 800 K, to an exhaust pressure of 101 kPa. If the air enters the nozzle with a velocity of 100 m/s, determine the air exhaust velocity. Ass..
a 5 ft3 tank containing steam at 14.7 psia 1 quality is fitted with a relief valve. determine the heat transfer to the
a stamped 1010 steel hot rolled alternator bracket is subject to an alternating bending stress sigmaxb 27349 psi
a conductor 1 ft long moves at right angles to a uniform magnetic field. find the voltage induced in the conductor if
A power plant generates steam from coal burning which burns at 3,000oF and produces about 13,000 BTU per pound. The steam is put into a poorly insulated turbine which allows 2,000 BTU per pound of coal to escape to the atmosphere at 90oF. Knowing the..
a a rigid tank containing 20 kg of refrigerant 134a as saturated vapor at 1.0 bars and -26.43 c is heated until the
a helium gas in a pistoncylinder is compressed from 100kpa 300 k to 200kpa in a polytropic process with n1.5. find the
One kilogram of water contained in a piston-cylinder assembly, initially at 1608C, 150 kPa, undergoes an isothermal compression process to saturated liquid. For the process, W 5
a vertical jet of water leaves a nozzle at a velocity of 10 ms and a diameter of 20 mm. it suspends a plate having a
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