1. Physical World and Measurement
The chapter elaborates on the essential principles of physics, particularly focusing on measurement and physical quantities. It covers the significance of units in measurement, methods for measuring various physical quantities like length, mass, and time, and introduces concepts such as density, Archimedes' principle, and the law of floatation. Understanding these concepts is crucial for applications in scientific experiments and engineering designs.
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Sections
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What we have learnt
- Physics involves the study of matter and energy.
- Measurement helps determine the properties and metrics of materials and systems.
- Different systems of units exist, including CGS, MKS, and SI.
Key Concepts
- -- Physical Quantity
- A quantifiable property of a material or system that can be measured.
- -- Fundamental Quantities
- Independent quantities such as length, mass, and time that serve as the basic building blocks for other measurements.
- -- Derived Quantities
- Quantities that are derived from fundamental ones, like speed and density.
- -- Density
- The mass of a substance divided by its volume, represented by the formula Density = Mass / Volume.
- -- Archimedes' Principle
- The principle stating that a body immersed in a fluid experiences an upward force equal to the weight of the fluid displaced.
- -- Relative Density
- The ratio of the density of a substance to the density of water, which is a dimensionless quantity.
Additional Learning Materials
Supplementary resources to enhance your learning experience.