State whether the weight of an iron sinker with cork combined in water will be more or less than that of the iron sinker alone in water.

Less

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Same

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None of the above

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Solution

The correct option is A Less
The weight of an iron sinker with cork combined in water will be less than that of the iron sinker alone in water.
This is because upthrust on cork due to water (when completely immersed) is greater than its weight.

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Similar questions

Following observations are taken while finding the relative density of cork. Find the relative density of the cork.

(I) Weight of sinker in water = 12.6 g
(II) Weight of sinker in water + cork in air = 13.7 g
(III) Weight of sinker and cork, both in water = 10.5 g

0.5 g {c m}^{- 3}

{50 c m}^{3}

{80 c m}^{3}

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