ch21-p025 - 25. (a) The magnitude of the force between the...

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25. (a) The magnitude of the force between the (positive) ions is given by F qq r k q r == bg 4 0 2 2 2 π ε where q is the charge on either of them and r is the distance between them. We solve for the charge: qr F k × × ×⋅ 50 10
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