A cosmic-ray proton in interstellar space has an energy of, Ask an Expert

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Q. A cosmic-ray proton in interstellar space has an energy of 10.0 MeV and executes a circular orbit having a radius equal to that of Mercury's orbit around the Sun (5.80 × 1010 m). What is the magnetic field in that region of space?

Q. You hold a meterstick horizontally with the some mass suspended at the end. Rank the tork needed to keep stick steady, from largest to smallest.

A. Hold stick up at 45 degree with 50 lb weight
B. Hold stick horizontally with 50 lb weight
C. Hold stick downward at 45 degree with 50 lb weight

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Category:- Physics
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