Question
Here is the question : A BAR OF PLATINUM WAS ONCE USED TO REPRESENT THE EXACT MASS OF WHAT?
Option
Here is the option for the question :
- 1 ounce
- 1 kilogram
- 1 gram
- 1 pound
The Answer:
And, the answer for the the question is :
Explanation:
Between the years 1889 and 2019, the exact mass of one kilogram was standardized across the globe using a bar of platinum. Planck’s constant, a universal formula that may be found in the laws of physics, was substituted for the bar, which became known as “Le Grand K.” Although the first bar of platinum was cast in England, it was stored in a vault that was temperature and humidity controlled just outside of Saint-Cloud, France.
Platinum is a rare and valuable metal that has been used for thousands of years for jewelry and decorative objects. However, platinum has also played a role in the development of the modern system of measurement. In 1889, a bar of platinum was created to represent the exact mass of one kilogram, and this bar became the standard against which all other measurements of mass were made.
The idea of using a physical object to represent a unit of measurement is not new. For centuries, people used standard weights and measures, such as stones or grains, to measure various quantities. However, as scientific knowledge and technology advanced, it became clear that a more precise and standardized system was needed.
In 1889, the General Conference on Weights and Measures (CGPM) was established to create a universal system of measurement. One of the key tasks of this organization was to establish a standard for the kilogram, the unit of mass in the metric system.
To create this standard, a bar of platinum-iridium alloy was crafted that represented the exact mass of one kilogram. This bar, known as the International Prototype of the Kilogram, was kept under lock and key in a vault in Paris, and was used as the standard against which all other measurements of mass were made.
For over a century, the International Prototype of the Kilogram remained the standard for measuring mass. However, in recent years, concerns have been raised about the accuracy and stability of the bar. As a result, the CGPM voted in 2018 to redefine the kilogram based on a fundamental constant of nature, rather than a physical object.
While the bar of platinum is no longer the standard for measuring mass, it remains an important symbol of the history and development of the metric system. The creation of this bar, and its use as the standard for the kilogram, represents the culmination of centuries of work to create a system of measurement that is precise, standardized, and universal.
a bar of platinum was once used to represent the exact mass of one kilogram, and this bar became the standard against which all other measurements of mass were made. While the bar is no longer the standard for measuring mass, it remains an important symbol of the history and development of the metric system. As we continue to refine and improve our system of measurement, it is important to remember the contributions of those who came before us and the importance of standardization and precision in science and technology.