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The interior contents and materials of a small building weigh 25 tons, and together they have an average specific heat of 0.25 Btu/(lbm . F). Neglecting any inefficiency in the furnace, what amount of natural gas must be burned to raise the building's temperature from freezing to 70 F?
two sites are being considered for wind power generation. on the first site the wind blows steadily at 7 ms for 3000
While jogging on the beach (it's a warm summer day, about 30 deg C) a high-speed jet flies overhead. You guesstimate it's an altitude of about 3500 m, and count off about 5 s before you hear it. Estimate the speed and Mach number of the jet.
a long cylindrical rod of diameter 200 mm with thermal conductivity of 0.5 w m knbspexperienced uniform volumetric heat
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
A cooking pot whose inner diameter is 20 cm is filled with water and covered with a 4-kg lid. If the local atmospheric pressure is 101 kPa, determine the temperature at which the water starts boiling when it is heated.
the final paper provides you with an opportunity to integrate and reflect on what you have learned during the class.the
question 1approximate the torque and power necessary to rotate the inner 20 cm diameter cylinder shown in figure 1. sae
Air at 200 kPa enters a 2-m-Iong, thin-walled tube of 25-mm diameter at 150°C and 6 m/s Steam at 20 bars condenses on the outer surface.
gold au forms a substitutional solid with silver ag. compute the weight percent of gold that must be added to silver to
the figure below shows the geometrical stress concentration factor k for a flat bar loaded in uniaxial tension. the
consider a cold canned drink left on a dinner table. would you model the heat transfer to the drink as one two or three
The assessment to design a substation and the associated protection System.
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