Physical quantities are properties or attributes of physical systems that can be measured and expressed numerically. They provide a way to quantify various aspects of the physical world, such as length, mass, time, temperature, and electric charge, among others. Physical quantities can be categorized into two main types: 1. **Scalar Quantities**: These are quantities that are described by a magnitude alone and do not have a direction. Examples include mass, temperature, speed, volume, and energy.
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