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An inventor claims to have developed a power cycle rejecting heat into a cold reservoir at 300 K. If it is claimed that the thermal efficiency is 40%, evaluate the claim if the hot reservoir is at a) 800 K, b) 300 K and c) 600 K.
a crate with mass 50kg is pulled up a 30 degree incline by a person pulling on a rope that makes a 30 degree angle with
Helium gas enters a nozzle, whose isentropic efficiency is 95 percent with a low velocity, and it exits at 14.4 psia, 160 degrees F, and 940 ft/s. determine the temperature and pressure at the nozzle inlet.
a small household refrigerator is used to cool 20 liters of water initially at 22 degrees c. the cop of the
a stationary tethered balloon contains helium gas an ideal gas here at 0.00degc and 0.0700 mpa at a height of 1000 m.
A mass transfer tower operating at 1 atm and 300 K uses water, which enters free of ammonia at the top, to reduce the ammonia (NH3) concentration in air exhausted from a reactor. At one plane (W) in the tower, the concentrations of ammonia in the liq..
an electric water heater having 0.2 m3 capacity employs an electric heater to warm the water from 22degc to 55degc. the
Water flows from the bottom of a large tank where the pressure is 120 psia to a turbine located 65 ft below the bottom of the tank that produces 40 hp. The pressure at the turbine exit is 42 psia and the water velocity is 36 ft/sec. The flow rate of ..
The thermal protection system for NASA's Space Shuttle Orbiter was effective due to its exceptional thermal-insulation properties. Calculate the heat flow (per square meter) across a 50-mm-thick ceramic tile with an outer surface temperature of 1200 ..
a power cycle operates between a high-temperature reservoir at temperature th and a lower-temperature reservoir at tl
a 1.5 m3tank fills through inlet a while supplying water through outlets b and c at the rates given below. determine
a 12.7 mm diameter twist drill is used to drill a hole in a low-carbon steel workpiece using a feed of 0.3 mmrev and a
two solid cylinders rods AB and BC are welded together at B and loaded. determine the magnitude of the force P for which the tensile stress in rod AB is twice the magnitude of the compressive stress in rod BC?
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