The relative density of a material is found by weighing the body first in air and then in water....

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The relative density of a material is found by weighing the body first in air and then in water. If the weight in air is \( (10.0 \pm 0.1) \mathrm{gf} \) and the weight in water is \( (5.0 \pm 0.1) \mathrm{gf} \), then the maximum permissible percentage error in relative density is
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