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Assuming air to be an ideal gas, what would be the mass of air in a classroom of size 20 ft x 15 ft x 9 ft assuming the pressure inside the classroom is 1 atm and the classroom is at a constant temperature of 20^o C . Would the mass of gas inside the class room change much if the room is filled with N_2? Why?
an expansion in a gas turbine can be approximated with a polytropic process with exponent n 1.25. the inlet air is at
the rigid bar ac is supported by a pin at f and two identical links bd and ce. the length between point a and b is 22
a nozzle is attached to a horizontal pipe and discharges water into the atmosphere as shown in the figure. the inflow
compute the design factor of a rod that is under a tensile load of 3125 lb. the rod is rectangular 1.5 in by 3.5 in and
fully developed laminar flow occurs between two horizantal parralel plates. the distance between the plates is 0.25
r-134a at 20 psia and 40of is compressed slowly adiabatically and without friction to a final pressure of 200 psia.
1kg of superheated r-134a at 10 bar and 150oc is cooled and condensed in a cylinder at constant pressure. how much heat
a cylindrical tank of methanol has a mass of 40 kg and a volume of 51 l. determine the methanols weight density and
a specimen of aluminum having a rectangular cross section 10 mm x 12.7 mm 0.4 x 0.5 in. is pulled in tension with
Consider a NACA 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. Calculate cl and cmc/4 When the geometric angle of attack is 4 degrees, what is the section lift coefficient? Where is the center of pressure?
a 60-kg woman holds a 9-kg package as she stands within an elevator which briefly accelerates upward at a rate of g4.
a rope 25m long is cut into two pieces. one piece is bent into the shape of a square and the other into the shape of a
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