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In a fluorescent tube of diameter 3 cm, 7 10^18 electrons and 1.75 10^18 positive ions (with a charge of +e) flow through a cross-sectional area each second. What is the current in the tube?
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Question: A skier is accelerating down a 30.0 degree hill at 1.80 m/s2. What is the vertical component of her acceleration? How long will it take her to reach the bottom of the hill, assuming she starts from rest and acc ...
Question: A semicircle of radius a is in the first and second quadrants, with the center of curvature at the origin. Positive charge +Q is distributed uniformly around the left half of the semicircle, and negative charge ...
Question: A ring of radius R has total charge Q. A) At what distance along the z-axis is the electric field strength a maximum? Express your answer in terms of R. B) What is the electric field strength at this point? Exp ...
Blue-green light has a frequency of about 6.00 x 10^14 Hz. Determine its wavelength. Compare this wavelength to the size of an atom (about 10^-10 m) by calculating the ratio: wavelength/(atom size).
Question: A proton (with a rest mass m=1.67Ã-10âˆ'27kg) has a total energy that is 4.00 times its rest energy. a. What is the kinetic energy Ek of the proton? Express your answer in billions of electron volts to three si ...
Question: A point charge is released from rest in a region containing an electric field. The charge will start to move: (A) in a direction that makes its potential energy increase (B) in a direction that makes its potent ...
Question: Part A: Which of the following gives the correct permitted values of ml for l=2? Part B: A second important result is that electrons will fill the lowest energy states available. This would seem to indicate tha ...
A cheetah can run very quickly over short distances. Assume a cheetah has a constant velocity of 33.0 m/s and is approaching a gazelle that is initially at rest. When the cheetah is 90 m away, the gazelle begins to run w ...
Question: A simple pendulum consisting of a mass m attached to a massless string of length L is performing harmonic oscillations for small angles. Determine the period T in terms of L and the gravitational acceleration c ...
The amount of chemical energy released in burning heating oil is approximately 130 MJ per gallon. This is the amount of energy released as heat during combustion. (a) Suppose that during the winter, heating a home with o ...
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