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A parallel-plate capacitor with circular plates and a capacitance of 13.9F is connected to a battery which gives a voltage of 12.8V. What is the charge on each plate? How much charge would be on the plates if their separation were doubled while the capacitor remained connected to the battery? How much charge would be on the plates if the capacitor were connected to the battery after the radius of each plate was doubled without changing their separation?
As a freely falling object picks up downward speed, what happens to the power supplied by the gravitational force? Does it increase, decrease, or stay the same and Why.
A mass spectrometer has an adjustable magnetic field. When the magnetic field is 7.000e-2 T, a singly ionizedhydrogen atom (a proton) will strike the detector at a particular location.
A rocket is fired at a speed of 66.0 m/s from ground level, at an angle of 53.0 ° above the horizontal. By how much does the rocket clear the top of the wall
You sing into a well and find that the well resonates at frequencies of 187 Hz and 221 Hz with no resonances between these two frequencies. What is the frequency of the fundamental mode
A camper is trying to start a fire by focusing sunlight onto a piece of paper. The diameter of the sun is 1.39x109 m, and its mean distance from the earth is 1.50x1011 m. The camper is using a converging lens whose focal length is 10.1cm.
A certain lightbulb is rated at 75.0 W when operating at an rms voltage of 120 V. What is the resistance of the bulb
a surveyor 100 m from a long straight 200 kv dc power line suspects that its magnetic field may equal that of the earth
A 965 kg car traveling initially with a speed of 25.3 m/s in an easterly direction crashes into the rear end of a(n) 9510 kg truck moving in the same direction at 16.8 m/s. What is the velocity of the truck immediately after the collision
As a engineer, you are designing a heat pump that is capable of delivering heat at the rate of 22 kW to a house. The house is located where, in January, the average temperature is 10°C.
A couple of Physics question
A camera lens with index of refraction greater than 1.34 is coated with a thin transparent film of index of refraction 1.13 to eliminate by interference the reflection of light at wavelength ? that is incident perpendicularly on the lens. What multip..
A flywheel of mass 185 kg has an effective radius of 0.60 m (assume the mass is concentrated along a circumference located at the effective radius of the flywheel). (a) How much work is done to bring this wheel from rest to a speed of 120 rpm in a..
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