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In a hydroelectric installation, a turbine delivers 1500 hp to a generator, which in turn converts 75.0% of the mechanical energy into electrical energy. Under these conditions, what current does the generator deliver at a terminal potential difference of 2000 V.
The highest theoretical efficiency of a gasoline engine, based on the Carnot cycle, is 0.300 or 30.0%. what is the temperature in the cylinder immediately after combustion
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 7 m and, in starting, rotates according to ? = 0.30t2, When t = 5.0 s, what is the magnitude of the astronaut's linear speed
A copper rod and an aluminum rod of equal diameter are joined end to end in good thermal contact. what must be the length of the aluminum rod so that the temperature at the junction is 50°C
A solid (cylindrical) flywheel of mass m and radius r is initally at rest. A force F acts tangentially on its perimeter for a time t. Show that its angular velocity at t = 2Ft/mr . Illustrate what is its angular displacement during that time?
Knowing that these two tones are two harmonics apart, find the smallest length the tunnel could have. Also determine the harmonic number for these two tones
A 1.8 micro F capacitor is discharged, starting at t=0s. The displacement current through the plates is Idisp = (13A)exp(-t/2.5micro s)
what is length of the stick as measured from S?
A single circular loop of radius 0.24m carries a current of 2.7A in a magnetic field of 0.96T . What is the maximum torque exerted on this loop? t=______N*m
A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.00?C, What is the temperature on a spring day when the resistance is 216.0
A ceiling fan with 84cm diameter blades is turning at 61rpm. Assume the fan coasts to a stop 25 after being turned off. What is the speed of tip of a blade 10 s after the fan is turned off.
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 49.0m/s2, Find the maximum height ymax reached by the rocket
List and explain briefly similarities and differences between the electric force between two charges and the gravitational force between two masses.
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