Kilogram: (symbol: kg) is the base unit of mass in the International System of Units (SI) and one of the seven fundamental SI units. It is widely used globally in science, industry, commerce, and everyday life to measure weight and mass.
Interesting Facts:
Interesting Facts:
- The kilogram was originally defined as the mass of one liter (1,000 cm³) of water at its maximum density (~4°C).
- For much of the 19th and 20th centuries, it was based on the mass of the International Prototype Kilogram (IPK), a platinum-iridium alloy cylinder stored in France.
- Since 2019, the kilogram has been defined in terms of the Planck constant (h), a fundamental constant of nature. This modern definition ties the kilogram to a universal physical property rather than a physical object.
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