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Q. A charge of -2.65 nC and a charge of -6.45 nC are separated by a distance of 40.0 cm. Find the position at which a third charge of +7.00 nC can be placed so that the net electrostatic force on it is zero.

Q. if a flea can jump straight up to a height of .440m what is its initial speed as it leaves the ground? How long is it in the air?

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