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A Carnot engine has an efficiency of 0.861, and the temperature of its cold reservoir is 381 K.
(a) Determine the temperature of its hot reservoir.
(b) If 5440 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine?
A person has severe hearing loss that reduces the intensity in his inner ear by 31.5 dB. What amplification factor is needed for this person
A 2.00 meter long, straight rod is 1.00 mm in diameter an is made of pure copper (specific gravity 8.93). What is the potential difference between the ends on the wire
A solenoid made out of 3500 turns of a fine silver wire about a tube 1cm in radius has a potential drop of 3.2V at a current of 2A in the lab. What is the cross-sectional area of the wire
A meter stick, sitting on a frictionless table top, is struck by a wad of clay with a force, F = 4.0 N at an angle. The meter stick will rotate in the plane of the table. Conclude the magnitude of the torque about the axis of rotation located at t..
A person of mass 75 stands at the center of a rotating merry-go-round platform of radius 2.8 and moment of inertia 920. The platform rotates without friction with angular velocity 1.78. The person walks radially to the edge of the platform. Compute a..
The flux through a loop is given by ?m = (0.20t 2 - 0.58t) , where ?m is in webers and t is in seconds. Find the induced emf as a function of time
An MP3 player operates with a voltage of 3.7 V, and is using 0.28 W of power. Find the current being supplied by the player's battery
A vented tank of large cross-sectional area has a horizontal pipe .12m in diameter at the bottom. The tank holds a liquid whose density is 1500 kg/m^3 to the height of 4.0 m.
A flower pot fell of a windowsill and falls past the window below. you may ignore air resistance. it takes the pot .470s to pass the window, which is 1.80m hight. how far is the top of window below the windowsill from w/c the flower pot fell.
You are traveling on an airplane. The velocity of the plane with respect to the air is 110 m/s due east, What is the heading of the plane with respect to the ground
A tennis ball of mass m=0.057kg and speed v=24 m/s strikes a wall at a 45 degrees angle and rebounds with the same speed at 45 degrees. What is the direction of the impulse given to the ball
A cylindrical lead rod with a diameter of 2.54 cm and a length of 76.2 cm is initially at a temperature of 20.0 C. After reaching equilibrium, what is the final temperature of the rod and the mercury
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