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 .

AlegsaOnline.com - 2020 / 2023 - License CC3