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A Carnot engine works between temperatutes T1 = 495K and T2 = 302K. It drives a Carnot refrigerator that works between temperatures T3 = 293K and T4 = 270K (see the figure). Find the ratio of Q3 to Q1.What is the percent efficiency of the engine? What is the Carnot coefficient of performance, KC, of the refrigerator?
A car drives north at 46 for 10 and then turns east and goes 5 at 60. At last, it goes southwest at 30 for 6.0. What is the average velocity.
A pair of speakers separated by 0.700m is driven by the same oscillator at a frequency of 662Hz. An observer, originally positioned at one of the speakers, begins to walk along a line perpendicular to line joining the speakers. (Assume the speed o..
A wheel is spinning clockwise at a 10 revolutions per second at t = 0. Due to friction in the bearings supporting the axle, the wheel slows down, losing 0.500 revolutions per second in angular velocity each second, until it comes to rest.
A spherical Christmas tree ornament is7.18 cm in diameter.What is magnification of the image ofan object placed 8.6 cm away from the ornament.
What is tension in each rope
A solenoid of radius 1.1 cm produces a magnetic field at its center is 0.28 T. What is the magnetic flux by the center of the solenoid.
Evangelista Torricelli was the first to put forward the idea that we live at the bottom of an ocean of air. (i) Given the value of the atmospheric pressure at the surface of the Earth.
Find the resultant force of a tank that is entirely filled with an incompressible fluid and has a piston at end. Side going into take F=100N
What centripetal force will the ride exert. How far should the stone fall so that the pulley has 6.50 J of kinetic energy.
Two point charges, +3.75 µC and -6.05 µC, are separated by 1.21 m. What is the electric potential midway between them
The current in the circuit if the speed v is 0.75 m/s , determine which end of the rod is positive.
A car of mass m moving at speed v1 collides and couples with the back of a truck of mass 2 m moving initially in the similar direction as the car at a lower speed v2.
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