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The rate of heat loss Q . loss through a window or wall is a function of the temperature difference between inside and outside ? T, the window surface area A, and the R value of the window, which has units of (ft2 . h . °F)/ Btu. (a) Using the Buckingham Pi Theorem, find an expression for rate of heat loss as a function of the other three parameters in the problem. (b) If the temperature difference ? T doubles, by what factor does the rate of heat loss increase?
a gas-turbine power plant operates on the simple brayton cycle between the pressure limits of 100 and 800 kpa. air
the radii of the exducer exit given that the radius ratio at that location is 0.4.
what is the ratio of the dynamic viscosity of air to that of water at standard pressure and temperature of 20degc? what
A 4 cm diameter pipe passes water at a rate of 1 m3/s. If we neglect viscous shear, what pressure drop per unit length must be imposed across this pipe to accelerate the volumetric flow rate by 1 m3/s2?
a carnot engine receives 15 btus from a source at 900 f and delivers 6000 ft . lbf s of power. determine the engine
The velocity profile for a film of liquid flowing down a vertical wall is given by. Where L is the thickness of the film, u is the downward velocity, xis the distance perpendicular to the wall and are the liquid density and viscosity. Sketch the velo..
consider a small simple rankine power cycle which produces 600kw power from an electric generator with an efficiency of
Design a gear train which satisfies the above criteria. Use a sketch to illustrate your design, label the gears A, B, C, etc. from the driver to the driven gear, and state the number of teeth on each gear
a thin metal cylinder contains an ideal gas. the cylinder has a cross sectional area of 100 cm2. the surroundings
1. Refer to Problem 3.19. Using Eq. (3.51), determine the variation of the relative density with depth. Use Qc 5 1.
air flows through a turbine airfoil passage in the shape of a converging-only nozzle with an exit cross-sectional area
but they vary in number of outputs, interfacing, cascadability, current limiting, and drive capability. As always, examine the data sheets carefully before substituting these parts! What is a Capacitor?
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