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प्रश्न
Define one kilogram, the S.I. unit of mass.
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उत्तर
One kilogram (kg) is the S.I. unit of mass. It is defined as the mass of the international prototype of the kilogram, which is a platinum-iridium alloy cylinder stored at the International Bureau of Weights and Measures in France.
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संबंधित प्रश्न
Write true or false.
Mass is the measure of quantity of matter.
Match the following column:
| Column A | Column B |
| (a) Length of a housing plot | (1) Clock |
| (b) Breadth of a book | (2) Beam balance |
| (c) Mass of an apple | (3) Thermometer |
| (d) Period of time for study | (4) Measuring tape |
| (e) Temperature of a body | (5) Graph paper |
| (f) Surface area of a leaf | (6) Metre ruler |
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The comparison of a known quantity with the unknown quantity is the mass.
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Common (beam) balance:
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