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Using webers molecular theory of magnetism, describe the polarity of the magnetic poles produced by stroking a magnetic material from right to left with the south pole of a magnet.
Use counterclockwise as the positive angular direction, between the limits of -180?and +180?as measured from the positive x axis.Answer in units of ?.
A 55.4 g arrow traveling at 64.7 m/s hits a bale of hay and stops after entering 0.37 m into the hay. Assuming constant acceleration, find the magnitude of the force in N by the bale on the arrow.
A car coasts down a hill with a 6.0% grade (6.0 foot drop for every 100 feet of horizontal distance) at a constant speed of 6.59 m/s. Assuming the car and driver together have a mass of 5410 kg, what is the power needed for the car and driver to g..
A 7.5m long extension cord carries a current of 12 amps. The cord is made of two wires, carrying currents in opposite directions, separated by a distance of 4.9mm
What is the average power dissipated by a resistor of resistance R = 25 ohm in an LRC circuit for which the power factor is equal to 0.25 and the maximum voltage of the AC source is 8 V
A pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table. What is the angular speed of the pencil
One solenoid is centered inside another. The outer one has a length of 55 centimeter and contains 6800 coils, Estimate the mutual inductance of the solenoids
A capacitor with its plates separated by paper stores 5.0 of charge when it is connected to a particular battery. How much charge does that capacitor store
Identical particles are placed at the 80 cm and 50 cm marks on a meter stick of negligible mass. evaluate the angular speed of the meter stick as it swings during its lowest position
A 250MW laser pulse is focused with a lens to a diameter of 2.0m. What is the laser beams electric field amplitude at the focal point
a cat is laying in front of a convex lens in such a way that his body is aligned to the optical axis of the lens its
A woman on a rocket traveling at 0.72c (with respect to Earth) observes a meteor come from in front of her and pass her at 0.72c. How fast is the meteor moving with respect to Earth
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