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A cylindrical torsion bar is made by bonding a solid bar made of material 1 inside a tube made of material 2, as shown below. The yield stresses of the two materials are known as tauy1 and tauy2. Both materials have the same shear modulus, G, and can be considered elastic perfectly plastic. Assume tauy2=4tauy1 and r2=3r1. a) find the twist rate at initial yield in the bar b) what twist rate is required to yield all of material 2. Assume tauy1=4tauy2 c) plot shear stress as a function of radius r at the state of twist calculated in part b
Determine (a) the velocity of the air at the duct inlet and (b) the temperature of the air at the exit.
a 3 cm diameter bar 3 m long is attached to two walls on either end of the bar. the walls are at a temperature of 100
consider a 24-kw hooded electric open burner in an area where the unit costs of electricity and natural gas are 0.10kwh
at the instant shown the angular velocity of the 6kg bar is 10radsec counterclockwise and its angular acceleration is
The number-average molecular weight of a polypropylene is 1100000 g/mol. Compute the degree of polymerization.
sherry wine is a blend of different wines. 200 kg of sherry was being produced by blending 3 different wines. alcohol
a projectile is launched from point a and lands on the same level at d. its maximum altitude is h. determine and plot
Calculate energy savings, implementation costs and simple payback. You should be able to find some tips and calculations from the text book.
Determine the velocity of the airplane required for pilot to experience weightlessness at the top of the circular path.
a carnot refrigerator is maintaining foodstuffs in a refrigerated region at 2degc by rejecting heat to the atmosphere
A petroleum engineer estimates that the present production of 400,000 barrels of oil during this year from a group of 10 wells will decrease at the rate of 15% per year for years 2 through 10. Oil is estimated to be worth $25 per barrel. If the inter..
a rigid copper tank initially containing 1 m3 of air at 295 k carrying air at 295 k 15 bar is connected by a valve to a
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