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0.64 lbm of saturated liquid water at 10 psia absorbs a constant 3.5 kW of energy from an electrical resistance heater in an isobaric process; until the water reaches a temperature of 200 F. a) how long did this take? Minutes b) what was the initial volume? ft3 c) What was the final volume? ft3
a heat engine power cycle is operating on a carnot cycle and has a thermal efficiency of 75. the waste heat from this
cara starts from rest at t 0 and travels along a straight road with a constant acceleration of 6 fts2 until it reaches
A frictionless piston-cylinder contains H2O initially at 1000 kPa and 200C. The system is slowly cooled at constant pressure to 20C. Determine the temperature at which you would expect two phases to exist. Calculate the work for the entire process
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) the isentropic efficiency of the compressor and (b) t..
a mountain climber carries a barometer which reads 30.1 in hg at the base of the mountain. after her climb the
the truck is to be towed using two ropes. if the resultant force is to be 950 directed along the positive axis
a piston cylinder contains air at 350 kpa and 20 c. it is then heated at constant pressure until its volume increases
½ kg of a liquid-vapor water mixture in a rigid tank initially at 2 bar is heated by 120V heater for 5 minutes until it becomes a saturated vapor at 4 bar. Changes in kinetic and potential energies can be ignored.
given a simple rankine cycle with temperature and pressure from the boiler of 580degc 10 mpa and a condenser pressure
an 18-m-long steel wire of 5-mm diameter is to be used in the manufacture of a pre-stressed concrete beam. it is
consider a large vessel divided into two chambers by a dividing nwall such as that described in lecture on 23 feb. the
a 10-kg closed system undergoes a heating process 100 kj. work is done by the system on the surroundings 100 kj. the
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