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A rigid, insulated tank that is initially evacuated is connected through a valve to a supply line that carries helium at 200 kPa and 120 degrees C. Now the valve is opened and helium is allowed to flow into the tank until the pressure reaches 200kPa, at which point the valve is closed. Determine the flow work of the helium in the supply line and the final temperature in the tank?
a 250-kg crate b is suspended from a cable attached to a 20-kg trolley a which rides on an inclined i-beam as shown.
a 0.12-m3 rigid tank contains saturated refrigerant- 134a at 800 kpa. initially 25 percent of the volume is occupied by
The number-average molecular weight of a polypropylene is 1100000 g/mol. Compute the degree of polymerization.
design a double-reduction gear train that will transmit 7.45 kw from an electric motor running at 1750 rpm to an
an insulated cylinder is initially filled with saturated r-134a vapor at a specified pressure. thenbsprefrigerant
suppose a hollowed cylinder is made from an aluminum alloy that has the following properties su 600 mpa sy 500 mpa
the boat is to be pulled onto shore using two ropes. If the resultant force is to be 1000 N, directed along the keel aa , determine the magnitude of forces T, P acting in each rope at the angle teta of P so that the magnitude of P is minimum. T ac..
a partitioned chamber that is well insulated has frac12 filled with h2o at 500 deg f and 50 psia and the other frac12 a
consider a carnot refrigeration cycle with a working fluid of r-134a operating between temperatures of -10oc and 20oc.
it takes 15 seconds to raise a 1200 kg car and the supporting 300 kg hydraulic lift platform to a height of 2.8 m. the
the elevation change available at the grand coulee dam is 330 feet. what is the maximum possible power per unit mass
steam flows through a horizontal adiabatic throttle which controls the flow to 25.0 ft3s and then through an adiabatic
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