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The electric field of a capacitor remains unchanged, if the plates change their separation, but the charges remain the same. Show with equations the new energy of the capacitor relative to the initial energy, if the separation is doubled.
A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). calculate the power delivered to the primary
The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is one-twentieth of an atmosphere. how far below the water can she swim
Albert stands on a frictionless turntable, holding a bike wheel. Both Albert and the wheel are initially stationary. find the final angular momentum had by the rest of the system
A point charge with charge q1 = 2.00?C is held stationary at the origin, How much work W is done by the electric force on the moving point charge
A gas contains NO2 molecules at 30 °C. The mass of a N02 molecule is 1.53 · 10-26 kg. What is the average speed of the molecules
Water flows from a 1/2 inch diameter pipe with a flow of 1m/sec. How many kg of water flow from the pipe in onesecond? How many gallons per day
A typical wall outlet voltage is 120 volts in the United States. Personal MP3 players require much smaller voltages, typically 709.5 mV. If the number of turns in the primary coil is 1353, calculate the number of turns on the secondary coil of the ad..
Two compact sources of sound oscillate in phase with a frequency of 110 Hz where the speed of sound is 340 m/s. What is the phase difference in the sound waves from the two sources at that point
Follow these steps to solve this problem: Two identical loudspeakers, speaker 1 and speaker 2, are 2.0 m apart and are emitting 1700-Hz sound waves into a room where the speed of sound is 340 m/s. Compute the path-length difference r
an aluminum wire carrying a current of 4a has a cross-sectional area of 9e-06 m2. find the drift speed of the electrons
An electron enters a region of space containing a uniform 0.0000199-T magnetic field. Its speed is 199 m/s and it enters perpendicularly to the field. Find the radius of the electron's orbit
A glass is half-full of water, with a layer of vegetable oil(n = 1.47) floating on top. A ray of light travelingdownward through the oil is incident on the water at an angle of56.1°.
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