### What is the wire''s linear charge density

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Q1. A proton orbits a long charged wire, making 1.50 times 10^ {6} revolutions per second. The radius of the orbit is 1.60 cm. What is the wire's linear charge density?

Q2. A rock stuck in the tread of a 59.0--diameter bicycle wheel has a tangential speed of 3.00. When the brakes are applied, the rock's tangential deceleration is 1.60.

Q3. The top of Mt. Everest is 8750 m above sea level. Assume that sea level is at an average Earth radius of 6.38×10^6 m. What is the magnitude of gravitational acceleration at the top of Mt. Everest? Mass of the Earth is 5.97×10^24 kg.

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