Question

Physical quantities are also known as:
A) Derived quantities
B) Base quantities
C) Professional quantities
D) Energetic quantities

Answer 1

A physical quantity is a property of a material or system that can be measured with the help of measuring devices.Scalar quantities have only magnitude. Vector quantities have both magnitude and direction.

Complete step by step answer:
An important step in chemistry is observation. In general, observations are of two types : quantitative and qualitative. Quantitative are the numerical data and information of a substance. It is far more important than the qualitative observations. In chemistry, we make various measurements that aid us in describing both chemical and physical properties. Both the number and the unit are essential parts of a measurement, because the unit provides the reported value a sense of size.
A measurement determines the quantity, dimensions or extent of something,usually in comparison to a specific unit. A unit is a definite quantity adopted as a standard of measurement. Thus, the physical quantities are also called as the base quantities since they form the basis of measurement. For example, time, length,weight,etc.
Like,if you were told that the distance between your house and school is 25, you would ask “25 what?” This distance could be anything 25 inches,25 meters, 25 kilometers,or anything. A number without any unit is meaningless. So, the correct answer is “Option B”.

Note: Physical analysis is determined using various equipment. These equipment ranges from simple metric scales to large scale devices.