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A vapor compression cycle heat pump using R-22 is used to provide 20.0 × 103 Btu/h of heat to a house. The evaporator temperature is 14.0°F and the condenser temperature is 70.0°F.
The refrigerant exits the compressor as a saturated vapor and exits the condenser as a saturated liquid. The isentropic efficiency of the compressor is 80.0%. Determine
a. The mass flow rate of the refrigerant.
b. The power input to the compressor.
c. The coefficient of performance of this system.
A hydrogen atom initially in the ground state absorbs a photon, which excites it to the = 4.00 state, estimate the frequency of the photon
A piano is at rest on a ramp inclined 17o above the horizontal the ramp exerts a normal force of 360 Newton on the piano. Find the magnitude of the piano weight
in the U.K, the power companies supply an rms voltage of 240V to most home outlets. If you were to try and use your standard U.S. rated 1790W (at 120V) hairdrying in the u.K
The hour, minute, and secondhands on a clock are 0.25 , 0.31 , and 0.37 long,respectively. What are the distances traveled by the tips of the hands in a 45 interval
In the following exoergic nuclear reaction, 12D + 13T ? 01n + 24He. what percentage of the initial mass is converted into energy
A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, What is the direction of the third piece just after the explosion
As the earth rotates, what is the speed of a physics student in Miami, Florida, at latitude 26degrees Ignore the revolution of the earth around the sun. What is the speed of a physics student in Fairbanks, Alaska, at latitude 65
A complementary pair of ideal n-channel and p-channel MOSFETs are to be designed to produce the same I-V characteristics when they are equivalently biased.
Drops of rain fall perpendicular to the roof of a parked car during a rainstorm. find the average force exerted by the rain on the roof
Assume that a low-density gas has only one resonant frequency, ?0, and show that n ? Nq^2 / (2?0me(?0^2-?^2) ) starting with n^2 = Nq^2 / (2?0me(?0^2-?^2) ). Fully justify any mathematical expansion you employ.
To correct myopia, is it necessary to move the image formed by the eye closer to or farther from the eyes lens system, Is the curvature of this lens concave or convex
A mass-spring system oscillates with an amplitude of 4.60 cm. If the spring constant is 240 N/m and the mass is 435 g, determine the mechanical energy of the system. Calculate the speed of the sphere's CM at the bottom of the ramp. Determine the m..
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