What is the base unit of mass in the International System of Units (SI)?
Q: What is the base unit of mass in the International System of Units (SI)?
A: The kilogram is the base unit of mass in the International System of Units (SI).
Q: How is the definition of a kilogram currently determined?
A: As of May 20, 2019, the definition of a kilogram is based on the Planck constant as 6.62607015×10−34 kg⋅m2⋅s−1.
Q: Are there any other methods for defining a kilogram?
A: Yes, there are attempts to define a kilogram in other ways. For example, one method specifies a number of atoms of a certain substance at a certain temperature.
Q: How many pounds does one kilogram equal?
A: One kilogram equals slightly more than 2.2 pounds.
Q: How many kilograms are in one tonne?
A: One tonne is equivalent to one thousand kilograms.
Q: What is the weight of one litre water at sea level and 3.98°C (39.16°F; 277.13K)?
A: At sea level and 3.98°C (39.16°F; 277.13K), one litre water weighs almost exactly one kilogram .
Q: When was this basis for defining grams established?
A: This basis for defining grams was established in 1795 .
