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The thermal efficiency of a reversible power cycle operating between hot and cold reservoirs is 20%. Evaluate the coefficient of performance of
a) a reversible refrigeration cycle operating between the same two reservoirs.
b) a reversible heat pump cycle operating between the same two reservoirs. State all assumptions
a gas is confined by a piston 10 cm in diamater on which rests a weight. the mass of the piston and weight together is
A horizontal platform rests on four vertical springs, each of stiffness 15kN/m and mass 0.25kg. what will the frequency of oscillation of the table be if it has a mass of 2.okg
write a matlab program that determines the probability of 4 of a kind in a 5-poker draw. dont use formula. create a
a blower develops 750mm of water gauge at a speed of 1480rpm and a flow rate of 38cubicmeter per sec. determine the
rope bca passes through a pulley at point c and supports a crate at point a. rope segment cd supports the pulley and is
the net contents in ounces of canned soup is a random varialbe with probability distribution fx 4x-11.75 11.75 lt x lt
a pot full of water 4l is to be placed on a stove until it boils. the stove element puts 2500w into the water in the
steam at 5mpa at 500 degrees enters a nozzle steadily with velocity of 80ms and leaves it at 2mpa at 400 degrees. the
An electric motor drives a pump, which moves a liquid fluorocarbon from a pipe with an inlet diameter of 13[cm] into a pipe with an outlet diameter of [8cm] at a rate of 0.15[m3/s]. The motor uses 200[kW] of electric power. The specific volume of the..
carbon dioxide is expanded in a steady flow frictionless process through a turbine from 0.9 mpa to 0.1 mpa. the initial
a heat pump uses r-134a as the working fluid and operates on an ideal vapor-compression cycle. the condenser pressure
Determine the magnitude of tensile force and corresponding normal stress of a wire A 28-ft length of 0.25-in
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