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A building window pane that is 1.2 m high and 0.8 m wide is separated from the ambient air by a storm window of the same height and width. The air space between the two windows is 0.06 m thick. If the building and storm windows are at 20 and -10oC, respectively, what is the rate of heat loss by free convection across the air space?
an otto cycle uses air as the working fluid its state at the beginning of the compression is 14 psia and 60 f its
What tightening torque should be used if the connection is permanent and the fasteners are lubricated? What portion of the external load is taken by the bolts? By the members?
a cylinder is confined in a cylinder by a spring-loaded frictionless piston so that the pressure in the fluid is a
Half a kilogram of nitrogen, initially at 350K and 200Kpa is compressed through a poly tropic process with pv^1.4= constant. If the final temperature is measured to be 400K, find the work in the process.
it is proposed to heat a home using a heat pump. the rate of heat transfer from the house to the environment is 15 kw.
consider two solid blocks one hot and the other cold brought into contact in an adiabatic container. after awhile
Determine the mean effective pressure of an ideal Otto cycle that uses air as the working fluid; it's state at the beginning of compression is 13 psia and 56°F; it's temperature at the end of combustion is 1,525°F; and it's compression ratio is 11. U..
calculate the following the u10050 stirling motor stirling engineoverall efficiency thermal efficiency mechanical
for a brittle material that has a crack of length 0.04mm and flexural strength and elastic modulus values of 88.1 mpa
an engineer is making an estimate for a home owner. this owner has a small stream of water q1.4cfs t40cthat is located
an aluminum cube initially at 400oc with a dimension of 2 cm on each side is cooled using 30oc air with a convection
a 200-kg 5-m-wide rectangular gate shown innbspthe figure is hinged at b and leans against thenbspfloor at a making an
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