Grade 9 Science Exam Prep - Trillium Woo PDF
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Trillium Woo
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Summary
This document includes a table of physics formulas and definitions like density, resistance, and the factors of resistance. It also has an explanation of the concepts and includes illustrations and equations used in science.
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 +-----------------+-----------------+-----------------+-----------------+ | **Name** | **Symbol** | **Unit** | **Formula** | +=================+=================+=================+=================+ | Density | D | g/cm^3^ |...
 +-----------------+-----------------+-----------------+-----------------+ | **Name** | **Symbol** | **Unit** | **Formula** | +=================+=================+=================+=================+ | Density | D | g/cm^3^ | m/V | | | | | | | | | (1 m з = 1000L | | | | | | | | | | 1 cm з = 1ml) | | +-----------------+-----------------+-----------------+-----------------+ | Volume | V | Cm^3^ | m/V | +-----------------+-----------------+-----------------+-----------------+ | Mass | m | Grams (g) | D x V | +-----------------+-----------------+-----------------+-----------------+ | Voltage | V | Volts (V) | I x R | +-----------------+-----------------+-----------------+-----------------+ | Resistance | R | Ohms (Ω) | V / I | +-----------------+-----------------+-----------------+-----------------+ | Current | I | Amperes (A) | V / R | +-----------------+-----------------+-----------------+-----------------+ | Energy(Watt) | E | Joules (J) | | +-----------------+-----------------+-----------------+-----------------+ | Charge | Q | Coulomb (C) | | +-----------------+-----------------+-----------------+-----------------+ | Time | T | Seconds (s) | | +-----------------+-----------------+-----------------+-----------------+ | Neutrons | | Not - nor + | Mass - Protons | +-----------------+-----------------+-----------------+-----------------+ | | | | | +-----------------+-----------------+-----------------+-----------------+ **Density** - The mass of a substance per unit volume. **Resistance** - Resistance is a property of a substance to hinder the movement of electricity and turn it into another form of energy (like heat). Low resistance things, like copper, mean that there\'s nothing trying to stop the flow of electrons. High resistance means there\'s many things trying to stop the flow of resistance, like tungsten wires in light bulbs **Factors of Resistance** - **Length, Thickness, and Tempature** **Length** - Shorter = electrons get through quicker (low resistance) Longer = electrons get through slower (high resistance) **Thickness** - Thicker = electrons can flow through easily (low resistance) Thinner = electrons have to squeeze through (high resistance) **Temperature** - Hotter = electrons move quicker (high resistance) Colder = electrons move slower (Low resistance) Atoms ➡ Compounds ➡ Molecules
