Question

a set of physical quantities which cannot be expressed in terms of any other quantites are known as​

Answer 1

Answer:

Quantities that can be measured, and in terms of which, laws of physics are described are called physical quantities. Examples are length, mass, time, force, energy, etc.

Explanation:

Physical quantities are classified into two types. There are fundamental and derived quantities. Fundamental or base quantities are quantities which cannot be expressed in terms of any other physical quantities. These are length, mass, time, electric current, temperature, luminous intensity and amount of substance

Quantities that can be expressed in terms of fundamental quantities are called derived quantities. For example, area, volume, velocity, acceleration, force.

Different types of Measurement Systems

1. the f.p.s. system is the British Engineering system of units, which uses foot, pound and second as the three basic units for measuring length, mass and time respectively.
2. The c.g.s system is the Gaussian system, which uses centimeter, gram and second as the three basic units for measuring length, mass and time respectively.
3. The m.k.s system is based on metre, kilogram and second as the three basic units for measuring length, mass and time respectively.
4. SI unit System:- The system of units used by scientists and engineers around the world is commonly called the metric system but, since 1960, it has been known officially as the International System, or SI (the abbreviation for its French name, Systeme International). The SI with a standard scheme of symbols, units and abbreviations, were developed and recommended by the General Conference on Weights and Measures in 1971 for international usage in scientific, technical, industrial and commercial work.