What do you mean by term "Physical Quantity"? Give examples of 4 physical quantities.

Explanation

### Step-by-Step Text Solution:

1. **Definition of Physical Quantity**:
A physical quantity is any property or characteristic of a physical system that can be measured. It is expressed in terms of a numerical value and a unit.

2. **Examples of Physical Quantities**:
- **Time**: This is a measure of the duration of events. It can be measured in units such as seconds, minutes, or hours.
- **Mass**: This refers to the amount of matter in an object. It can be measured in kilograms (kg), grams (g), or pounds (lb).
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