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If an amount of heat Q_H is extracted from a hot reservoir (at temperature T_H) but is simply wasted by dumping into a cold reservoir (at temperature T_C) instead of using it to run a Carnot cycle to extract useful mechanical work, by how much has the entropy of the Universe increased? Compare this to the amount of work which could have been generated by this same amount of heat running a Carnot engine.
Two particles with equal mass have charges of 1.0 microCoulombs and 3.0 nanoCoulombs respectively. What must be their mass if their mutual gravitational attraction is to equal their Coulomb repulsion?
the distance between the object and the eyepiece of a compound microscope is 18 cm. what is the total magnification of the microscope
A 91 g arrow is fired from a bow whose string exerts an average force of 115 N on the arrow over a distance of 78 cm. Illustrate what is the speed of the arrow as it leaves the bow?
In a television, electrons shoot down the picture tube and strike fluorescent material on the screen, causing light to be emitted and producing the picture. assume that a certain set, the electrons are accelerated from rest 2.0 x 10^8 ms-1 in abou..
Compute the magnitude and direction of the total gravitational force exerted on one sphere by the other three.
An airplane flies due south at 190-km/h relative to the air. There is a wind blowing at 73.0 km/h to the east relative to the ground. What are the plane's speed and direction relative to the ground.
an ac power generator produces 60 a (rms) at 4000 v. the voltage is stepped up by an ideal transformer, what is the turn ratio of the transformer
Make a drawing of this situation, and choose the best axes for x and y so that you have the least number of components.)
Body A weighs 104 N, and body B weighs 30 N. The coefficients of friction between A and the incline are ?s = 0.56, Find the acceleration of A if A is initially at rest
A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 4.0 m/s perpendicular to a 0.50-T magnetic field, What is the mass of the rod?
A fugitive tries to hop on a freight train traveling at a constant speed of 5.4m/s . Just as an empty box car passes him, What is the distance traveled to reach the box car
If a transformer steps the voltage down from 8800 V (at the pole) to 120 V (at the building) and it is to deliver 1000 kW to the building at 80% efficiency, what is the ratio of primary turns to secondary turns
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