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The acid digestion test left 2.595 g of fiber from a composite specimen weighing 3.697 g. The composite specimen weighs 1.636 g in water. If the specific gravity of the fiber and matrix is 2.5 and 1.2, respectively, find the
1. Theoretical volume fraction of fiber and matrix
2. Theoretical density of composite
3. Experimental density
4. Weight fraction of fiber and matrix
5. Void fraction
In 1654 Otto von Guericke, inventor of the air pump gave a demonstration before the noblemen of the Holy Roman Empire in which two teams of eight horses could not pull apart two evacuated brass hemispheres.
Consider the chip cooling scheme of Problem 3.146, but with an insulated top wall placed at the pin tips to force airflow across the pin array.
a missile with a conical nose cone with a semivertex angle of 16 deg is flying through sea level air at a speed of 817
If the output of a gas turbine is 300 KW and its efficiency is 20 percent, what will be the heat supplied
Design the pump power and the diameter of brunching pipes D1, D2, D3, so that the flow rate coming into all buildings are Q1=Q2=Q3=4.5m^3/hr, when all four valves v, V1, V2, V3 are open.
superheated steam enters a nozzleat 0.13 mpaand 600 k and exits at 0.1 mpa. heat interactions and frictional effects
an electric motor draws a current of 10 amp with a voltage of 110v. the output shaft develops a torque of 10.2 n-m and
A steel rod of circular cross section will be used to carry an axial load of 91 kips. The maximum stresses in the rod must be limited to 28 ksi in tension and 10 ksi in shear. Determine the required diameter for the rod.
the manometer shown above in problem 1 above contains water and kerosene. with both tubes open to the atmosphere, the free surface elevations differ by H=20mm determine the elevation difference when a pressure of 98.0 Pa is applied to the right.
The frost may be assumed to have a mass density of 700 kg/m3 and a latent heat of fusion of 334 kJ/kg.
A Stirling cycle operates with 1 kg of air between thermal energy reservoirs at 27oC and 527oC. The maximum cycle pressure is 2000 kPa and the minimum is 100 kPa. Assuming constant specific heat at room temperature,
a rigid tank contains 1 kg of water at 90 degrees c. if 200 g of the water are in the liquid phase and the rest is
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