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A piston-cylinder contains 0.8 kg of nitrogen initially at 100 kpa and 27 degrees. The nitrogen is compressed slowly in a polytropic process during which pv^1.3 = constant until the volume is reduced by one-half. Determine the work done and the heat transfer for this process.
a 1.5 m concrete post is reinforced with six steel bars each with a 28mm diameter. knowing that es 200 gpa and ec 25
three seconds after a polisher is started from rest small tufts of fleece from along the circumference of the
a heat exchanger at an industrial plant uses river water to condense 2x105 kgh of steam from saturated vapor to
1. half a mole of a monoatomic ideal gas is initially at 1000 k and a pressure of 20 bar. it is expanded adiabatically
a cylinder fitted with a piston has an initial volume of 2 ft3 and contains nitrogen at 20 lbfin2 at 80 f degrees. the
r-134a is throttled from 1200kpa and 40oc to 200kpa. it is known that heat of 5kjkg is lost from r-134a to the
a rigid vessel contains saturated water mixture at 1 atm. find the liquid by volume such that the water will pass
A block of metal has a 90 notch cut from its lower surface. The notched part rests on a circular cylinder of diameter 2.0 cm, as shown in Fig. 4.15. If the lower surface of the par is 1.3 cm above the base plane, how deep is the notch?
in water at a depth of 7 m the absolute pressure is read to be 164 kpa. determine a the local atmospheric pressure and
determine if a simple supported w12 x 26 a36 steel beam has the capacity to support loads that produce 50ksi of
the system is at rest in the position shown with the 12-lb collar a resting on the spring k 20 lbft when a constant
an al cube 0.1m on each side is initially at a temp of 300 c. the cube is immersed in a fluid at 100 c. calculate 1.
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