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Whisker filaments of SiC that are 5 μm thick are coated withan aluminum alloy using a chemical bonding process. The coating process is carried out at 650 oC before the sample iscooled to room temperature. Elastic stresses due to thermal expansion mismatch do not begin to appreciably accumulate until the alloy has cooled to approximately 200 oC due to alloyviscosity. If the stresses necessary to maintain whisker/coating compatibility are assumed to be normal stresses acting only in thedirection of the filament axis, what is their sign and magnitude at20 oC? Relevant materials properties are:ESiC = 476 GPA, EAl = 70 GPA,αSiC = 4.7 x 10-6/oC,αAl = 21 x 10-6/oC.
The pressure inside the cylinder is 50 atm and temperature is 298o K. Provide your engineering judgement (with calculations) to justify or not justify the shipment of the cylinder.
A rigid 1ft^3 vessel contains R-134a originally at -20F and 27.7% quality. The refrigerant is then heated until its temperature is 100F. Calculate the heat transfer required to do this, in Btu.
Assuming the center of gravity of the student aligns with the axis of the pole and the pole has an elastic behabior, how high can they climb (in meters, m) just before the pole buckles
The discharge from the Renenutet sugar beet plant causes the DO at the critical point to fall to 4.0 mg/L. The Meskhenet Stream has a negligible BOD and the initial deficit after the river and wastewater have mixed is zero
The entrance to the pipe is reentrant, with ke = 0.9, and the nozzle loss coefficient is 0.045. Find the flow rate and the pressure head at the base of (entrance to) the nozzle.
the pin at B is attached to member ABC and can slide freely along the slot cut in the fixed plate. Neglecting the effect of friction, determine the couple M required to hold the system in equilibrium when.
A six bladed rushton turbine 2.0m in diameter rotating at 25 rev/min in a tank 4m deep, water temperature= 10 degree celcius. For this flocculation system calculate the following: a) Reynolds number
1. a tensiometer is used to measure a compacted soil in the field that has a matric suction of 200 kpa under
A sample of dry sand with a specific gravity total of 16.49 kN/m3 and a relative density of 2.67 grains, is placed outdoors. During a rainy period, the sample volume remains constant but the degree of saturation increases to 40%.
Assuming constant acceleration, determine how long the train blocked the crossing. Dis- regard the width of the crossing.
A 20g mass vibrates accordings to the equation x=0.0009cis(3pit/2 + pi/2). Find the amplitude, period, max velocity, max acceleration, spring constant "K", and the total energy of the system
An engineer in a developing country observes that his project bankaccount has grown from 1,600,000 to 1,769,279 (local currencyunits) in 20 days with no deposits or withdrawals being made.
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