Do you really know how big a kilo is?
A kilo is a metric unit of mass equal to (10^{3}) grams. It is the base unit of mass in the International System of Units (SI). The kilogram is defined as the mass of the International Prototype Kilogram (IPK), a cylinder of platinum-iridium alloy that is kept at the International Bureau of Weights and Measures (BIPM) in Sèvres, France.
The kilogram is one of the seven base units of the SI. The other base units are the meter (length), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and candela (luminous intensity)
The kilogram was originally defined in 1795 as the mass of a cubic decimeter of water at 4 °C. The kilogram was redefined in 1889 as the mass of the IPK. The IPK is a cylinder of platinum-iridium alloy that is 39 mm in diameter and 39 mm in height. It has a mass of 1 kg.
The kilogram is used to measure mass in a wide variety of applications, including:
The current definition of the kilogram is based on a physical artifact, the IPK. This makes the kilogram susceptible to changes in the mass of the IPK. In addition, the IPK is difficult to transport and compare with other kilograms.
For these reasons, there is a growing movement to redefine the kilogram in terms of fundamental physical constants. One proposed definition is based on the Planck constant. Another proposed definition is based on the Avogadro constant.
A new definition of the kilogram is expected to be adopted by the General Conference on Weights and Measures (CGPM) in 2024. The new definition will be based on fundamental physical constants, making the kilogram more stable and reproducible.
Unit | Value in Kilograms |
---|---|
Tonne | (10^{3}) |
Metric ton | 1000 |
Quintal | 100 |
Stone | 6.35029318 |
Pound | 0.453592 |
Ounce | 0.028349523125 |
Gram | 0.001 |
Milligram | (10^{-3}) |
Microgram | (10^{-6}) |
Nanogram | (10^{-9}) |
Picogram | (10^{-12}) |
From | To | Multiply by |
---|---|---|
Kilograms | Grams | 1000 |
Kilograms | Pounds | 2.20462 |
Kilograms | Ounces | 35.274 |
Grams | Kilograms | 0.001 |
Grams | Pounds | 0.00220462 |
Grams | Ounces | 0.035274 |
Pounds | Kilograms | 0.453592 |
Pounds | Grams | 453.592 |
Pounds | Ounces | 16 |
Ounces | Kilograms | 0.028349523125 |
Ounces | Grams | 28.349523125 |
Ounces | Pounds | 0.0625 |
Object | Mass (kg) |
---|---|
Human body | 70 |
Car | 1000 |
Truck | 10000 |
Airplane | 100000 |
Earth | (5.972 \times 10^{24}) |
Sun | (1.989 \times 10^{30}) |
Fact |
---|
The kilogram is the only SI base unit that is defined by a physical artifact. |
The IPK is the only physical artifact that is used to define an SI base unit. |
The kilogram is the most widely used unit of mass in the world. |
The kilogram is used to calibrate other measuring devices, such as scales and balances. |
The kilogram is the unit of mass that is used to define the mole. |
Kiloize is a word that I just made up. It means to make something heavier by a factor of 1000. For example, you could kiloize a car by adding 1000 kg of weight to it.
I think that kiloize is a useful word because it can be used to describe a wide variety of things. For example, you could use kiloize to describe:
1. What is the difference between a kilogram and a pound?
A kilogram is equal to 2.20462 pounds.
2. How many grams are in a kilogram?
There are 1000 grams in a kilogram.
3. What is the heaviest object in the world?
The heaviest object in the world is the Earth. The Earth has a mass of (5.972 \times 10^{24}) kg.
4. What is the lightest object in the world?
The lightest object in the world is a photon. A photon has a mass of 0 kg.
5. What is the most common unit of mass used in the world?
The most common unit of mass used in the world is the kilogram.
6. What is the definition of a kilogram?
A kilogram is defined as the mass of the International Prototype Kilogram (IPK).
7. What are the challenges with the current definition of the kilogram?
The challenges with the current definition of the kilogram are that it is based on a physical artifact, the IPK, which is susceptible to changes in mass, and that the IPK is difficult to transport and compare with other kilograms.
8. What is the future of the kilogram?
A new definition of the kilogram is expected to be adopted by the General Conference on Weights and Measures (CGPM) in 2024. The new definition will be based on fundamental physical constants, making the kilogram more stable and reproducible.
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