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1. Two kilograms of 40-C air is contained in a 4-m3 volume. Calculate the pressure, density, speci?c volume, and speci?c weight.
2. The temperature outside a house is -20-C and inside it is 20-C. What is the ratio of the density of the outside air to the density of the inside air? Would in?ltration, which results from cracks around the windows, doors, and siding, etc., occur even with no wind causing a pressure difference?
Cantilever Beam with maximum tensile strength. A cantilever beam is to be made using a symmetrical I section beam. The cantilever is to carry a load of 40kN at a distance 2.5m from the fixed end. The situation allows for a depth of I beam to be no..
there are two gears one with radius r and the other with radius 2.2r. the larger hear is subjected to an external
sixty kilograms per hour of water runs through a heat exchanger entering as saturated liquid at 200 kpa and leaving as
air at 1 atm 90f and 8 fts enters a thin-walled tube of 4-inch diameter. the tube surface temperaure is maintained at
A round cantilever bar is loaded. Given diameter d = 50mm, T = 0.1P N.m, F = 10P N. Allowable stresses are 100 MPa in tension and 60 MPa in shear on a section at a = 120 mm from the free end. Determine largest P.
a refrigerator uses a compressor that employs r-134a as the refrigerant. determine the power requirement w and
a seesaw is 20 feet long with a fulcrum at the center. three children want to get on at the same time. the masses of
a 15-tooth pinion having a pressure angle of 25ordm and module of 8mm is to drive an 18-tooth gear. determine for both
A flat bar is to be rolls but the rolls refuse to bite (the bar is not drawn into the roll gap). State at least two measures that could be taken.
a balloon weights 250 pounds and has a volume of 14000 cubic feet. it is filled with helium which weights 0.0112 pound
briefly explain why porosity decreases the thermal conductivity of ceramic and polymeric materials rendering them more
If the weather report says that it is 60°F outside, the barometric pressure is 28.50 in Hg, and the relative humidity is 85.0%, find the following values. The partial pressure of water. The mole fraction of water vapor in the air
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