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Consider a heat pump which is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 4.68. On a particularly hot day, the temperature outside the home is 90 degrees F, and the temperature inside the home is maintained at 70 degrees F. If the heat pump consumes 500W of electrical power, at what rate does it remove heat (W) from the home?
A transmission line is made of a core of copper surrounded by a concentric circular sheath of steel to give it strength. The copper core is 1.0 cm in diameter and the tightly fitting sheath has an outer diameter of 2.0 cm.
An airplane is flying through a thundercloud at a height of 2300 m. (Flying at this height is very dangerous because of updrafts, turbulence, what is the electric field at the aircraft
A lens placed at the origin with its axis pointing along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object
Electronics and inhabitants of the International Space Station generate a significant amount of thermal energy that the station must get rid of. How much power is radiated from each panel
A heat engine produces 9440 J. of heat while performing 2340 J. of useful work. What is the percent efficiency of this engine
three concentric conducting spherical shells have radii a, b, and c such that a
Neutron stars consist only of neutrons and have unbelievably high densities. Find the density of such a star
When the dried-up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.64 at an angle of 62.0 above the horizontal
a car slows down uniformly from a speed of 45 kmh to rest with an acceleration of -0.50 ms2. how long did it travel
The molecular mass of helium is 4 g/mol, the Boltzmann's constant is 1.38066×10^?23J/K, the universal gas constant is 8.31451 J/K· mol, What is the average kinetic energy of each helium atom
a 3.000 u 1 u 931.5 mevc2 object moving to the right through a laboratory at 0.8c collides with a 4.000 u object
compute the reactance of a .450 h inductor at frequencies 60hz compute the reactance of a 2.5 uf capacitor at the same
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