Understanding the Mass of Water: Why 1 kg of Water Equals 1 Kilogram

Explore the fundamental relationship between mass and water in the metric system.

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The mass of 1 kg of water is exactly 1 kilogram. This equivalence is because a kilogram is physically defined based on the mass of water, making it a straightforward conversion in the metric system.

FAQs & Answers

  1. Why is 1 kg of water defined as 1 kilogram? 1 kg of water is defined as 1 kilogram because the metric system is based on this mass equivalence, allowing for straightforward measurements.
  2. How does the metric system define mass? The metric system defines mass through the kilogram, which is based on the mass of a specific volume of water.
  3. What is the relationship between mass and volume in water? In water, mass and volume are directly related; 1 liter of water has a mass of approximately 1 kilogram under standard conditions.
  4. Are there any exceptions to the 1 kg mass of water? The definition holds true under standard conditions; however, variations in temperature and pressure can alter the density of water slightly.