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A spring of force constant k is cut into lengths of ratio 1:2:3. They are connected in series and the new force constant is k′. Then they are connected in parallel and force constant is k′′. The ratio k′:k′′ is

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A spring of force constant k is cut into lengths of ratio 1:2:3. They are connected in series and the new force constant is k. Then they are connected in parallel and force constant is k′′. The ratio k:k′′ is



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