answer the all correct answers pleeeeeeeeeeeeeeeeeeeeeeeease
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HLW MATE HERE IS YOUR CORRECT ANSWER...
(i) ans: physical quantity is a physical property that can be quantified. Examples of physical quantities are mass, amount of substance, length, time, temperature, electric current, light intensity, force, velocity, density, and many others. A best explanation is from 12th fundamentals.
(ii)ans: Derived quantities are quantities that are calculated from two or more measurements. Derived quantities cannot be measured directly. They can only be computed. Many derived quantities are calculated in physical science. Three examples are area, volume, and density.
(iii) ans: There are three fundamental units we'll deal with in this course: length, time, and mass. We'll see shortly how other quantities of physical interest can be made out of these three units. You already have a concept of units.
(iv) ans: Hand span and cubit are not used as standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit.
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