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two positive point like charges 4 MC each and each of mass 0.3 g are suspended as a...

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candygurlll | Student, College Freshman | (Level 1) eNoter

Posted April 15, 2013 at 1:16 AM via web

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two positive point like charges 4 MC each and each of mass 0.3 g are suspended as a pendulum. A length of a string is 30 cm. Electric field E is applied vertically up. WHat is the magnitude of the electric field if charges are in equilibrium?

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