Identify the CORRECT statement about system of units.

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Question

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Certain fundamental units are expressed by means of SI units with special names (such as joule, newton, watt, etc).
Scientific notation and the prefixes are used to simplify measurement notation and numerical computation, giving indication to the precision of the numbers.
The MKS based on seven base units is at present internationally accepted unit system and is widely used throughout the world.
The CGS units have well defined and internationally accepted unit symbols (such as m for metre, kg for kilogram, s for second, A for ampere, N for newton etc.).

Answer 1

The correct answer is Option 2.

Key Points

Scientific notation and prefixes are used to simplify the representation of very large or very small numbers, making them easier to read and understand.
These notations help indicate the precision of measurements, allowing scientists and engineers to communicate data more effectively.
Prefixes such as kilo (k), mega (M), and giga (G) for large quantities, and milli (m), micro (µ), and nano (n) for small quantities, are commonly used.
This system enhances numerical computation by reducing the complexity of numbers involved, thus facilitating easier calculations.
Scientific notation is a standardized form across various scientific fields, ensuring consistency and accuracy in data representation.

Additional Information

System of Units:
- A system of units is a set of related units that are used to measure various physical quantities.
- The International System of Units (SI) is the most widely used system of units globally.
SI Units:
- SI units are based on seven base units: metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd).
- These base units are used to derive other units such as newton (N) for force and joule (J) for energy.
CGS Units:
- The CGS system is based on centimetre (cm), gram (g), and second (s) as its base units.
- It is less commonly used today but is still prevalent in some scientific fields such as electromagnetism.
MKS System:
- The MKS system uses metre (m), kilogram (kg), and second (s) as its base units.
- It was a precursor to the SI system and laid the foundation for its development.