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प्रश्न
Give reason for the following.
Body parts should not be used for correct measurements of an object.
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उत्तर
Body parts have different sizes from person to person and hence the value varies. Since there is no uniformity or accuracy in the reading, body parts should not be used for the correct measurement of an object.
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संबंधित प्रश्न
Fill in the blank
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The density of aluminium is 2.7 g cm-3 and of brass is 8.4 g cm-3. For the same mass, the volume of:
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A block of iron has dimensions 2 m × 0.5 m × 0.25 m. The density of iron is 7.8 g cm−3. Find the mass of block.
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Name the S.I. unit.
Give a reason for the following.
Measuring units are standardized.
Assertion (A): Density is a derived physical quantity
Reason (R): Density cannot be derived from the fundamental physical quantities.
