A finite wire carrying a current I1 = 6.00A is shown in figure. It starts from point A. From A to B it is straight then curves into a circular part BC, which is centered at point O with radius R=3.00m and central angle 0=120°. Another long wire carrying a current I2=3.00A is also put in the region as shown. (a)Determine the net magnetic field from the wires at point O. I D=4.0m (b) Find the force exerted on a charge q = -2.8 µC, as it moves through point O at 350 m/s directed in the +y direction. A

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.