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Q.A proton orbits a long charged wire, making 1.30 times 10^{6} revolutions per second. The radius of the orbit is 2.00 cm.

What is the wire's linear charge density?

Q. A 200 lbs guy wants to slide down a plastic slide 24 ft long and on a 30 degree angle, after that the slide goes horizontally for 6 feet. Taking friction into consideration, how fast will he be going down the slide?

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