An ideal reversible thermodynamic pump is taking heat from the outside air at -10.0°C and discharging it into the house at 18.0°C. What is the coefficient of performance of this thermodynamic pump?
A) 10.4
B) 9.44
C) 0.644
D) 0.533
E) 0.0962
A
You might also like to view...
The diagram shows a planet at four positions in its orbit. At which position does it have the greatest angular momentum?
A) 1 B) 2 C) 3 D) 4 E) The angular momentum is the same at all four points.
In a Young's double-slit experiment, both the wavelength and the slit separation are increased by 25%. What happens to the distance between two adjacent bright fringes?
a. It decreases by 50%. b. It increases by 50%. c. The distance increases by 25% or more. d. The distance stays the same.
Which of the following provides important evidence for the existence of dark matter in clusters of galaxies?
A) careful counts of the numbers of galaxies in clusters B) the relative proportions of spiral and elliptical galaxies in clusters C) the high temperature and distribution of gas between the galaxies in clusters D) the total luminosity in visible light coming from cluster galaxies
A high power line carrying 1000 A generates what magnetic field at the ground, 10 m away?
A) 3.2 × 10-6 T B) 4.7 × 10-6 T C) 6.4 × 10-6 T D) 2.0 × 10-5 T E) 5.6 × 10-5 T