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What is the SI System? The International System of Units (SI) is the modern metric system used worldwide for scientific, technical, and everyday measurements. It replaced older systems like CGS, FPS, and MKS. SI units are divided into base units (fundamental) and derived units (combinations of base units). SI Base Units Base Quantity Unit Name […]

Units and Measurement Notes 1. What is a Unit? When we measure something, we compare it to a standard called a unit. For example, saying “5 meters” means you’re comparing a length to the standard unit “meter”. There are two types of units: Fundamental/Base Units: Basic units for quantities like length, mass, and time. Examples: