Electromagnetic waves and interference (Khan Academy)

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Light can seem mysterious. What is light made out of? What causes color? How do 3D movies work? Learn about some of the mysterious properties of light in these tutorials. (1) Introduction to electromagnetic waves Light: Electromagnetic waves, the electromagnetic spectrum and photons Electromagnetic waves and the electromagnetic spectrum Polarization of light, linear and circular […]

Magnetic forces, magnetic fields, and Faraday’s law (Khan Academy)

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Magnetic fields are extremely useful. The magnetic field of the Earth shields us from harmful radiation from the Sun, magnetic fields allow us to diagnose medical problems using an MRI, and magnetic fields are a key component in generating electrical power in most power plants. In this topic you’ll learn about the forces, fields, and […]

Circuits (Khan Academy)

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Circuits make computers, digital cameras, and video games possible. Circuits are driving an unprecedented rate of change in how we live. In this topic you’ll learn about the physics behind the electronic devices we use. (1) Ohm’s law and circuits with resistors Introduction to circuits and Ohm’s law Basic electrical quantities: current, voltage, power Resistors […]

Electric charge, field, and potential (Khan Academy)

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Electric forces hold together the atoms and molecules in your eyes which allow you to read this sentence. Take a moment and learn about the force that holds our bodies together. (1) Charge and electric force (Coulomb’s law) Triboelectric effect and charge Coulomb’s Law Conductors and Insulators Conservation of Charge (2) Electric field Electric field […]

Thermodynamics (Khan Academy)

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Heat can be useful, but it can also be annoying. Understanding heat and the flow of heat allows us to build heat sinks that prevent our computers from overheating, build better engines, and prevent freeway overpasses from cracking. (1) Temperature, kinetic theory, and the ideal gas law Thermodynamics part 1: Molecular theory of gases Thermodynamics […]

Fluids (Khan Academy)

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Atmospheric pressure is like an invisible friend who is always squeezing you with a big hug. Learn more about pressure, buoyant force, and flowing fluid so you can appreciate the sometimes invisible, but crucial, effect they have on us and the world around us. (1) Density and Pressure Specific gravity Pressure and Pascal’s principle (part […]

Oscillations and mechanical waves (Khan Academy)

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Waves are responsible for basically every form of communication we use. Whether you’re talking out loud, texting on your phone, or waving to someone in a crowd there’s going to be a wave transmitting information. Learn about the basics of waves in this topic, then learn more about light waves in the topics below. (1) […]

Torque and angular momentum (Khan Academy)

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Everything you’ve learned about motion, forces, energy, and momentum can be reused to analyze rotating objects. There are some differences, though. Here, you’ll learn about rotational motion, moments, torque, and angular momentum. (1) Rotational kinematics Angular motion variables Relating angular and regular motion variables Relationship between angular velocity and speed Rotational kinematic formulas (2) Torque, […]

Impacts and linear momentum (Khan Academy)

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Momentum ties velocity and mass into one quantity. It might not be obvious why this is useful, but momentum has this cool property where the total amount of it never changes. This is called the conservation of momentum, and we can use it to analyze collisions and other interactions. Bam! (1) Momentum and Impulse Introduction […]

Work and energy (Khan Academy)

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“Energy” is a word that’s used a lot. Here, you’ll learn about how it’s one of the most useful concepts in physics. Along the way, we’ll talk about work, kinetic energy, potential energy, conservation of energy, and mechanical advantage. (1) Work and energy Introduction to work and energy Work and energy (part 2) Conservation of […]