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The tensile strengths of brazed joints between two pieces of steel are often con- siderably higher than the tensile strength of the braze material itself. Furthermore, the strengths of thin joints are higher than those of thick joints. Explain.
An ideal Diesel cycle has a maximum operating temperature of T3= 862 C and a cut off ratio of 1.19. The state of the air at the beginning of the compression is P1 = 96 kPa and T1 = 15 C. This cycle is executed in a four-stroke, eight-cylinder engine ..
if the coefficient of rolling resistance of a cylinder on a flat surface is 0.5inch at what inclination of the surface
the flywheel of a small punching machine rotates at 360 rpm. each punching operation requires 1500 ft-lb of work and it
In the preparation of He, CH4 is removed but the gas composition contains a variation of CO and CO2 content. The He-CO-CO2 gas leaves the reactor at 1400 K through a nichrome alloy duct. The nichrome originally containing approximately 28-mol% Cr fai..
You are asked to measure the rate at which waste gases are being discharged from a stack. The gases entering contain 2.1 % carbon dioxide. Pure carbon dioxide is introduced into the bottom.
A golden bar of metal (5 centimeters by 18 centimeters by 4 centimeters) being transported by armored car is suspected of being fake, made from a less valuable metal with a thin coating of pure gold. The bar is found to have a mass of 2.7 kilograms. ..
Consider a mixture of saturated liquid water and saturated steam at 2 bar and x = 0.95 that is compressed adiabatically and reversibly to 25 bar in an open system. What is the initial temperature and entropy?
an electrical window air conditioner with a cooling capacity of of 8000 kjhr draws 6.00 amps of electrical current at
water and steam enter an insulated mixing chamber in steady flow. the liquid water enters at 20 0c and 3 bars with a
refrigerant-134a at 800 kpa and 25 degree c is throttled to a temperature of -20 degree c. determine the pressure and
An electric hoist consumes 5 kW of power at a constant rate to lift a 500-kg mass. Assuming that the hoist is 80% efficient, determine the maximum speed reached by the mass.
During an experiment conducted in a room at 25°C, a laboratory assistant measures that a refrigerator that draws 2 kW of power has removed 30,000 kJ of heat from the refrigerated space, which is maintained at -30°C. The running time of the refrige..
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