Sub-topics: Need for measurement; Units of measurement; Systems of units; SI units, fundamental and derived units; Significant figures; Dimensions of physical quantities; Dimensional analysis and its applications. Part 1: The Need for Measurement & Units 1.1 Why Do We Measure? (The Need for Measurement) Physics is a quantitative science. Every observation must be expressed in […]
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1. What is the Kinetic Theory? Imagine a box filled with tiny, invisible particles (gas molecules) zipping around at incredibly high speeds. The Kinetic Theory is a simple model that helps us understand how this chaotic microscopic motion explains the macroscopic properties of a gas we can measure, like pressure and temperature. It’s a set of assumptions about how gas
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1. What are Scalars? Imagine you’re telling a friend: You only need a number and a unit to describe these things. These quantities are called Scalars. Definition: A scalar is a physical quantity that has only magnitude. Examples of Scalars: 2. What are Vectors? Now, imagine you’re telling a friend: These statements have a number, a unit, and crucially, a direction.
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