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Consider a polished, unnotched specimen made 300M alloy forging loaded in the longitudinal direction (see page MH2-60). It is subjected to a fatigue stress cycle that ranges between minimum and maximum stress levels of 50 ksi and 150 ksi, respectively. Determine the number of cycles to failure according to the equivalent stress model. Repeat this calculation if the maximum stress remains unchanged while the minimum stress is reduced to 25 ksi.
a residential heat pump with a coefficient of performance of 2.4 delivers energy to the dwelling at a rate of 20 kw.
Tinplate (commonly used in the canning industry) is not plate or sheet of tin. It is actually a steel strip with a thin coating of tin. Discuss the pros and cons of using tin to protect steel.
Assuming a coefficient of static friction equal to 0.2 at the common surface, find the maximum torque that may be transmitted by the flywheel without slippage.
a wire of radius ri is coated by a process described above. it is fed to a reservoir filled with a newtonian fluid with
an electrical heater 100mm long and 5mm in diameter is inserted into a hole drilled normal to the surface of a large
Humans are able to control their heat production rate and heat loss rate to maintain a nearly constant core temperature of under a wide range of environmental conditions.
cylinder b has a velocity of 1.517 fts downward at t0 and a constant upward acceleration of 0.372 fts2. determine the
Derive an expression for the surface tension in the air bubble and from it, deduce the result for the given condition.
An alloy contains 105.0 kg of iron, 0.2 kg of carbon, and 1.0 kg of chromium. Calculate the alloy composition in weight percent. Calculate the alloy composition in atom percent.
A mixture of dry air and water vapor is at a temperature of 21C under a pressure of 101.3 kPa.The dew point temperature is 15C.(Ps= saturation pressure at 15C=1.7044 kPa;Pd=saturation pressure at 21C=2.4861 kPa) find humidity ratio and relative hu..
A cylindrical barrel has a narrow tube fixed to the top, as shown with dimensions in below figure. The vessel is filled with water to the top of the tube. Calculate the ratio of the hydrostatic force exerted on the bottom of the barrel to the weight ..
Verify that the exact solution from Prob. P4.80 is consistent with your result in part (a).
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