To make a strong uniform magnetic field, a superconducting solenoid is frequently employed. Once the current is "loaded" into the superconducting solenoid, the two ends can be tied together and then the current will continue to circulate forever. Calculate the inductance and the total energy stored in the following two superconducting magnets. Ignore the fields outside the magnets. (Part a) The strongest constant field that can be created with currently available laboratory equipment is . This field is created with a current of , inside a core with a diameter and an active length (where the field is basically uniform) of about . What is the inductance of the magnet, and the total energy stored
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Physics, 21.06.2019 21:50
Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?
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Physics, 21.06.2019 23:00
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
Physics, 22.06.2019 08:00
What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?
Answers: 1
To make a strong uniform magnetic field, a superconducting solenoid is frequently employed. Once the...
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