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A ball of mass m is connected to a string of length l and orbiting in a vertical circle at speed v.
a) Write an expression for the tension of the string when the ball is at the top of the circular path in terms of m, l, v, and g.
b) Write an expression for the tension of the string when the ball is at the bottom of the circular path in terms of m, l, v, and g.
What is the work you get out of each kJ of heat extracted from the basin? Repeat for the case that the water is at 100C. Comment on why efficient car engines run so hot.
A 0.7-lb block rests on top of a 0.5-lb block supported by but not attached to a spring of constant 9 lb/ft. The upper block is suddenly removed. Determine (a) the Maximum velocity reached by the 0.5-lb block, (b) the maximum height reached by the..
two kg of superheated steam contained in piston cylinder at 400 c and 600 kpa are cooled at a constant pressure by
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The heating is to be done in a mixing tank by direct injection of the steam, all of which condenses. Determine the two inlet mass flows needed to meet the desired hot water flow rate.
calculate the maximum permissible crack size in acenter cracked panel subjected to a unifrom stress of 20 ksi. the toughness is 50 ksi"in, the yield stress is 60 ksi, w=12 inches
a specimen of a 4340 steel alloy having a plane strain fracture toughness of 45 mpa m is exposed to a stress of 1000
using the compressibility chart determine the volume in m3 occupied by 20 kg of hydrogen h2 at 11.55 atm and -364 degf.
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