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Concrete has a density of 2500 kg/m3 and a compressive strength of 30 MPa. What is the maximum height of a column of concrete that can support its own weight? Does the radius of the column matter?
oxygen gas is compressed in a piston-cylinder device from an initial state of 0.8 m3kg and 25oc to a final state of 0.1
the performance of an ammonia absorption cycle refrigerator is to be compared with that of a similar vapor-compression
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
an iron blok m1kg initialy held stationary is dropped form a 100 m height. it strikes the groud and is assumed to be
for other properties fixed in a rakine cycle raising the condenser temperature causes what changes in the work and heat
blocks a and b are connected by a pulley system. the coefficient of kinetic friction between the block a and the
determine the slenderness ratio of a 5 m column with built end if its cross section is a circular with a radius of 40 mm and b 50 mm square use the concept of effective length.
a 1.0-mm diameter wire is maintained at a temperature of 400oc and exposed to a convection environment at 40oc with h
steel balls 12 mm in diameter are annealed by heating to 1150 k and then slowly cooling to 400 k in an air environment
a gas turbine operates with a regenerator and two stages of reheating and intercooling. this system is designed so that
at 500 bar and 500 deg c undergoes a throttling expansion to 1 bar. what will be the temperature of the steam after the
the suspended load exerts a force F=600 lb at A, and the weight of the bar OA is negligible. Determine the tensions at the cables and the reactions at the ball and socket support O
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