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The truss ABC shown in the figure supports a vertical load W at joint B. Each member is a slender circular steel pipe (E = 30,000 ksi) with outside diameter 4 in. And wall thickness 0.25 in. The distance between supports is 23 ft. Joint B is restrained against displacement perpendicular to the plane of the truss.
Determine the critical value Wcr of the load.
the masses of a b and c are 5 kg 15 kg and 100 kg respectively. the coefficient of friction between all contacting
Saturated liquid steam at 2 MPa steadily enters a valve where it is throttled to 0.3 MPa. The inlet and outlet diameter is 1 cm. The flow rate is 0.012 kg/s. Determine the outlet density [kg/m3] of the steam. Also show that it is reasonable to neglec..
A well-insulated piston-cylinder device initially contains 5kg of saturated mixture of refrigerant-134a at -12°C, in which 2.55kg of the refrigerant is in the liquid phase. An electric switch is turned on, and a 110-V source supplies current to a res..
Gear A rotates with an angular velocity of 100 rpm clockwise. Knowing that the angular velocity of arm AB is 50 rpm counterclockwise, determine the corresponding angular velocity of gear B.
now it is proposed that the liquid water coming out of the separator be used as the heat source in a binary cycle with
The landing gear on a commercial aircraft experiences an impulse load upon landing. Assuming seven such landings per day on average, how long would it take before the landing gear has been subjected to 108 load cycles? (Answer in years)
a spherical hot-air balloon is initially filled with air at 120 kpa and 35oc with an initial diameter of 3 m. air
determine the power produced by a simple sprinkler-like turbine that rotates in a horizontal plane at 500 rpm. the
An Incompressible fluid flows through a 10-in diameter horizontal constant area pipe. At one section the pressure is 150 psia and 1000 ft downstream the pressure has dropped to 100 psia.Find the total frictional force exerted on the fluid by the pipe
Determine the observed F value. Compare it to the critical table F value and decide whether to reject the null hypothesis. Perform a t test for independent measures on the data. Compare the t and F values. Are the results different? Use a = .05.
what would be the effect on the calculated value of the vane efficiency for mass of jockey in error by 0.001 measurements.
An isolated system has two phases, denoted by A and B, each of which consists of the same two substances, denoted by 1 and 2. Show that necessary conditions for equilibrium are
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