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Assume that the magnetic field of the earth is due to charged particles circulating in the molten core of the earth. If the magnetic dipole moment of the earth has magnitude 8.00 x 1023 J/T and we assume that the radius of the circular path taken by the charged particles is 3.50 x 106 m, what is the current produced by those charges? (Give your answer in the form "a.bc x 10^(y) A".)
Consider a copper wire (mass density 8.9 g/cc, resistivity 1.7E-8 ohm-m) with a diameter of 0.43 mm, How many meters long is this wire
The second harmonic sinusoidal standing wave in a pipe with both ends open has a wavelength of 2.00 m. The sound speed is 340 m/s How many nodes and anti-nodes are there in the displacement wave? How many nodes are there in the pressure wave? Draw..
A rock is rolled in the sand. It starts at 5.0 m/s, moves in astraight line for a distance of 3.0 m, and then stops. What is the magnitude of the average aceleration
Two spectators at a soccer game in Montjuic Stadium see, and a moment later hear, the ball being kicked on the playing field. The time delay for the spectator is 0.23 s, and for spectator B it is 0.12 s.
The lens of a slide projector with a focal length of 100.0 mm projects a slide onto a screen that is 10.0 m away. How far from the lens must the slide be placed to form a sharp image on the screen?(in cm)
A 10-kg box is at rest on a horizontal frictionless surface, at the end of an unstretched horizontal spring with constant k=4000 N/m, What is the speed of the box when it passes back through the equilibrium point
If two parallel conducting plates were separated by .60 cm, and the potential difference between the plates is 90V, the magnitude of the electric vector midway between the plates would be?
A flywheel in a motor is spinning at 530 rpm when a power failure suddenly occurs. The flywheel has mass 40.0kg and diameter 75.0cm. how many revolutions would the wheel have made during this time
It was a dark and storym night, when suddenly you saw a flashof lightning Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt?
A billiard ball moving at 5.30 m/s strikes a stationary ball of the same mass. Find the velocity (magnitude and direction) of the second ball after collision
A jet is circling an airport control tower at a distance of 24.5 km. Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other
A step-down transformer produces a voltage of 7.0V across the secondary coil when the voltage across the primary coil is 120V. What voltage appears across the primary coil of this transformer if 120V is applied to the secondary coil?
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