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A copper wire having diameter d= 3 mm is bent into a circle and held with the ends just touching (see figure). If the maximum permissible strain in the copper is emax = 0.0024, what is the shortest length L of wire that can be used?
1. Is it possible for two screw dislocations of opposite sign to annihilate each other? Explain your answer.
a gas turbine burns methane with 150 theoretical air. assume the air is 25 degrees celsius 100 kpa and has a relative
Steam enters a nozzle with an inlet are 1m^2 at velocity of 40 m/s a pressure of 900 kpa and a temperature of 300 C. The outlet pressure is 750 kpa. Assume the nozzle operates isentroically and adiabatically, indicate the enthalpy, entropy, specific ..
a rigid tank a of volume 0.6 m3 contains 3 kg water at 120 degrees celsius and the rigid tank b is 0.4 m3 with water at
Calculate the force of attraction between a K+ cation and a O2- anion, the centers of which are separated by a distance of 1.5 nm.
Use a confidence interval to express the estimated difference in population proportions of excellent ratings between the two groups of customers. Does it seem to matter which plant produces the tractors in terms of the quality rating received fro..
a 0.5-m3 vessel contains 10 kg of refrigerant-134a at -20oc. determine a the pressure b the total internal energy and c
a space vehicle is in a circular orbit of 2200-km radius around the moon. to transfer it to a smaller circular orbit of
a stone is released from an elevator moving up at a speed of 12 fts and reaches the bottom of the shaft in 2.5 s. a how
A piston-cylinder assembly fitted with a spring. The cylinder contains water, initially at 538oC, and the spring is in a vacuum. The piston face, which has an area of 125 cm2 , is initially at x1=50 cm.
a rankine cycle operates between pressure limits of 500 and 2 psia. the temperature of the steam entering the turbine
the process and volume relation is given p8-4vbar for a non flow process where v is in cubic meter.if 130kj of work is
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