1. Fill in the blanks. a. Any quantity that can be measured is called a ________ quantity. b. Physical quantities which do not depend on each other are called ________ quantity. c. Volume is an example of ________ physical quantity. d. ________ is finding out the exact value of an unknown quantity by comparing it with a fixed known quantity of the same kind. e. Millimetre is a ________ of metre.
Answer (1)
Let's go through each part of the question step-by-step:
a. Any quantity that can be measured is called a physical quantity.
A physical quantity is an aspect of physical reality that can be quantified through measurements. These include length, mass, time, temperature, etc.
b. Physical quantities which do not depend on each other are called independent quantities.
Independent physical quantities are those that do not vary with changes in other quantities in the system. Examples include temperature and pressure when looking at a gas in a closed system.
c. Volume is an example of derived physical quantity.
A derived physical quantity is obtained from base quantities through mathematical operations. Volume, for instance, is derived from length (i.e., length × width × height for a rectangular prism).
d. Measurement is finding out the exact value of an unknown quantity by comparing it with a fixed known quantity of the same kind.
Measurement involves using tools like rulers, scales, or thermometers to compare an unknown quantity against a standard unit of measure.
e. Millimetre is a submultiple of metre.
A millimetre (mm) is a submultiple of a metre (m), meaning it is a unit within the metric system that represents a smaller quantity than the base unit metre. Specifically, 1 metre = 1000 millimetres.
Understanding these concepts is crucial in physics as they form the foundation for discussing and analyzing the physical world around us.
