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An airplane, of overall length 55ft, is designed to fly at 680m/s at 8000-m standard altitude. A one-thirtieth-scale model is to be tested in a pressurized helium wind tunnel at 20 degrees Celsius. What is the appropriate tunnel pressure in atm? Even at this (high pressure), exact dynamic similarity is not achieved. Why?
One-half kilogram of water executes a Carnot power cycle. During the isothermal expansion, the water is heated until it is a saturated vapor from an initial state where the pressure is 1.5 MPa and the quality is 25%. The vapor then expands adiabatica..
in a preliminary design for a mail-sorting machine parcels moving at 2 fts slide down a smooth inclined ramp and a
find the total heat loss per m length of the steam line. Find also the temperature at the interface of steam and insulation.
a shaft is made of a steel alloy having an allowable shear stress of 12 ksi. If the diameter of the shaft is 1.5 in., determine the maximum torque T that can be transmitted. What would be the maximum torque T' if a 1 in. diameter hole is bored thr..
determine the velocity of on the outer rim of the spool at the instant shown when the cable is pulled to the right with
Air enters an adiabatic nozzle at 3 atm pressure and 100 F and emerges at 1 atm and 30 F. The inlet velocity is negligible. What is the discharge velocity?
A 12-ft^3 rigid tank contains refrigerant-134a at 40 psia and 55 percent quality. Heat is transferred now to the refrigerant from a source at 120 °F until the pressure rises to 60 psia. Assuming the surroundings to be at 75 °F, determine the a) amoun..
assume that oxygentc 154.6k pc 5.046 x 106 pa and vc 7.32x10-5 m3mol and water tc 647.3kpc 2.205 x 107 pa and vc 5.6
sketch a preliminary layout for the following heat exchanger systems. on the layout sketch indicate pipe work manifolds
a medical warmer operates using a heat pump. saturated r-12 enters the compressor at a temperature of -10 c and exits
hot oil cp2.3 kjkg.c at a rate of 2.5 kgs enters an adiabatic exchanger at 180 c and leaves at 150 c. cooling water
a shaft is subjected to bending and torsion such that the bending stress on the surface is 80 mpa and the shear stress
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