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copper has 8.5 x 10^28 electrons per cubic meter. a 12-gauge copper wire is 25.0cm in length and 2.05mm in diameter. if a current of 1.55A is flowing in the wire, what is the average drift speed of the electrons along the wire? (there are 6.24 x 10^18 electrons in 1 coulomb of charge).
In reaching her destination, a backpacker walks with an average velocity of 1 m/s, due west. How far east did she walk (in kilometers)
A resistor with resistance 14M? is connected in series with a capacitor with capacitance 1.0?F and a battery with emf 13.5.0V. what is the time constant
A stone is dropped into a river from a bridge at a height h above the water. Another stone is thrown vertically down at a time t after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second sto..
A diffraction grating has a spacing of 350 lines per mm and sits L = 47.7 cm from a screen. what is the wavelength of the laser
If a pipe wrench of length 18 cm is positioned vertically on pipe, with the handle pointing up, and a force of 150 N, what is the torque on the pipe
A solution has a hydronium-ion concentration of 1.0 x 10^-3 mol per liter. What is the hydroxide-ion concentration of this solution
A classroom slide projector projects an enlarged (50 times taller) image of a 24mm high photographic film onto a screen located 10 meters from the projector. What focal length lens (cm) does the slide projector require to produce a sharply focus i..
A communications satellite with a mass of 400 is in a circular orbit about the Earth. The radius of the orbit is 2.8×10^4 as measured from the center of Earth. Compute the weight of the satellite on the surface of the earth.
A stunt driver is attempting to jump 20 cars of total length of 42m using an inclined ramp. Calculate the Minimum angle of the ramp that would allow the stunt driver to clear 20 cars
On a clear day the electric field in the atmosphere near the earth's surface is 100 N/C, directed vertically downward. What is the potential at the top of Pike's Peak, 14,110 ft above sea level
What percentage of the power of the battery is dissipated across the internal resistance and hence is not available to the bulb
The force component along the displacement varies with the magnitude of the displacement, Find the work done by the force in the interval
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