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1 a reversible refrigeration cycle operates between cold and hot reservoirs at temperaturesnbsptc andnbspth
1 an inventor claims to have developed a food freezer that at steady state requires a power input of 06 kw to extract
1 at steady state a power cycle develops a power output of 10 kw while receiving energy by heat transfer at the rate of
1 an inventor claims to have developed a power cycle having a thermal efficiency of 40 while operating between hot and
1 a reversible power cycle operating between hot and cold reservoirs at 1000 k and 300 k respectively receives 100 kj
1 a 015-m-diameter pulley turns a belt rotating the driveshaft of a power plant pump the torque applied by the belt on
1 a gas in a piston-cylinder assembly undergoes a process for which the relationship between pressure and volume
1 for each case determine the specified property data and locate the state by hand on a sketch of thenbspt-y diagrama
using the tables for water determine the specified property data at the indicated states in each case locate the state
for each case determine the specified property value and locate the state by hand on sketches of thenbspp-y andnbspt-y
two kilograms of air within a piston-cylinder assembly execute a carnot power cycle with maximum and minimum
one and one-half pounds of water within a piston-cylinder assembly execute a carnot power cycle during isothermal
two reversible heat pump cycles operate in series the first cycle receives energy by heat transfer from a cold
a heat pump is under consideration for heating a research station located on an antarctica ice shelf the interior of
a heat pump with a coefficient of performance of 35 provides energy at an average rate of 70000 kjh to maintain a
by supplying energy at an average rate of 24000 kjh a heat pump maintains the temperature of a dwelling at 208c if
at steady state a heat pump provides energy by heat transfer at the rate of 25000 btuh to maintain a dwelling at 708f
1 in severe head-on automobile accidents a deceleration of 60nbspgs or more 1nbspgnbsp5 322 fts2 often results in a
1 water contained in a piston-cylinder assembly initially at 300degf a quality of 90 and a volume of 6 ft3 is heated at
an ac induction machine has six poles and is designed for 60-hz 240-v rms operation when the machine operates with 10
1 a 60-hz four-pole three-phase induction motor delivers 35 kw of mechanical output power at a certain operating point
1 a six-pole three-phase 440-v 60-hz induction motor has the following model impedancesrs 08 q xs 07 q rr 03 q xr
1 a four-pole three-phase induction motor rotates at 1700 rmin when the load is 100 n-m the motor is 88 percent