Which of the following are SI units? This question is often asked in scientific and engineering contexts, as the International System of Units (SI) is the most widely used system of measurement in the world. Understanding which units are part of the SI is crucial for accurate communication and collaboration in various fields. In this article, we will explore the different types of SI units and identify which of the following examples are indeed part of this system.
The International System of Units was established in 1960 and is maintained by the International Bureau of Weights and Measures (BIPM). It consists of seven base units, which are the fundamental units of measurement from which all other units are derived. These base units are:
1. Meter (m) – the unit of length
2. Kilogram (kg) – the unit of mass
3. Second (s) – the unit of time
4. Ampere (A) – the unit of electric current
5. Kelvin (K) – the unit of temperature
6. Mole (mol) – the unit of amount of substance
7. Candela (cd) – the unit of luminous intensity
Now, let’s identify which of the following examples are SI units:
A. Foot (ft) – This is not an SI unit. The meter is the SI unit for length.
B. Kilogram (kg) – This is an SI unit. It is the base unit for mass.
C. Minute (min) – This is not an SI unit. The second is the SI unit for time.
D. Ampere (A) – This is an SI unit. It is the base unit for electric current.
E. Kelvin (K) – This is an SI unit. It is the base unit for temperature.
F. Liter (L) – This is not an SI unit. The mole is the SI unit for amount of substance, and volume is typically measured in cubic meters (m³).
G. Candela (cd) – This is an SI unit. It is the base unit for luminous intensity.
In conclusion, the following examples are SI units: Kilogram (kg), Ampere (A), Kelvin (K), and Candela (cd). Understanding the SI units is essential for accurate scientific and engineering measurements, as well as for global communication in these fields.
