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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 15-kg steel gas tank holds 300 l of liquid gasoline having a density of 800 kgm3. if the system is decelerated with 6
a mass of 1 kg attached to a spring with a spring constant of 112 nm oscillates horizontally on a smooth frictionless
five hundred cubic feet per second of water flow in a rectangular open channel 20 ft wide and 8 ft deep. after passing
1. (a) In your own words describe briefly the phenomenon of luminescence. (b) What is the distinction between fluorescence and phosphorescence?
block a is released from rest and slides down the frictionless ramp to the loop. the maximum height h of the loop is
A flat bar as shown in the figure below is subjected to an axial load F equal to 500 kn. Assuming that the stress in the bar is limited to 200 n/mm^2 determine the thickness of the bar. All dimensions are in mm
Use Lagrange"s equations to derive the EOM for the system. You have a function L of some What are Lagrange"s Equations?
The supporting beam for a maintenance access platform strip spans 7 m and is to be simply supported at 1 m from each end as sketched in Figure 1. Assume that the beam could be subject to a distributed load of 2 kN/m and one point load of 6 kN.
a car with a mass of 1570 kg is supported by four springs each with a spring constant of 25 nmm. in traveling over an
Superimpose a uniform ?ow parallel to the x-axis of 10 m=s and a source at the origin of strength q ¼ 10p m2/s. (a) Write the velocity potential f and stream function c.
What is the major assumption shear plane model theory ?
The tank-pipe system of Fig. P6.49 is to deliver at least 11 m3 /h of water at 20°C to the reservoir. What is the maximum roughness height allowable for the pipe?
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