Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with a goal of creating a set of online tools that help educate students. The organization produces short lectures in the form of YouTube videos. Its website also includes supplementary practice exercises and materials for educators. All resources are available to users of the website. The website and its content are provided mainly in English, but are also available in other languages, including Spanish, Portuguese, Italian, Russian, Turkish, French, Bengali, and Hindi.

Wikipedia
Khan Academy
Khan Academy
YouTube Video
  • Khan Academy Kids is a free, fun educational program that will inspire a lifetime of learning and discovery for young children. Download here: https://www.khanacademy.org/kids?utm_source=youtube&utm_medium=desc Kids ages 2-5 engage with thousands of interactive activities aligned with the Head Start Learning Outcomes Framework and Common Core Standards. The curriculum includes reading and liter...

Khan Academy
Khan Academy
YouTube Video
  • In this video, David explains how an atom can absorb and emit photons of particular values and how to determine the allowed values. Watch the next lesson: https://www.khanacademy.org/science/physics/quantum-physics/atoms-and-electrons/v/bohr-model-radii-derivation-using-physics?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/phys...

Khan Academy
Khan Academy
YouTube Video
  • In this video David gives an introductory explanation of what the quantum wavefunction is, how to use it, and where it comes from. Watch the next lesson: https://www.khanacademy.org/science/physics/quantum-physics/atoms-and-electrons/v/atomic-energy-levels?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/quantum-physics/at...

Khan Academy
Khan Academy
YouTube Video
  • In this video, David (and surfer Dan) explain how to determine the momentum of a photon. Watch the next lesson: https://www.khanacademy.org/science/physics/quantum-physics/photons/v/photoelectric-effect?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/quantum-physics/photons/v/photon-energy?utm_source=YT&utm_medium=Desc&ut...

Khan Academy
Khan Academy
YouTube Video
  • In this video David solves a few exmaple problems involving concave and convex mirrors using the mirror equation and magnification equation. Watch the next lesson: https://www.khanacademy.org/science/physics/geometric-optics/lenses/v/convex-lenses?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/geometric-optics/mirrors/v/...

Khan Academy
Khan Academy
YouTube Video
  • In this video David explains how to use the formula for finding the center of mass and does a few sample problems to find center of mass. Watch the next lesson: https://www.khanacademy.org/science/physics/torque-angular-momentum/rotational-kinematics/v/angular-motion-variables?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physi...

Khan Academy
Khan Academy
YouTube Video
  • Sal finds the equation of a line perpendicular to a line given in slope-intercept form that passes through a specific point. Watch the next lesson: https://www.khanacademy.org/math/high-school-math/math1/math1-analytic-geometry/math1-parallel-perpendicular-eq/v/find-the-equation-of-a-line?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath Missed the previous lesson? https://www.khanacadem...

Khan Academy
Khan Academy
YouTube Video
  • The slopes of parallel lines are equal, and the slopes of perpendicular lines are opposite reciprocals. This is a worked example of determining whether given lines are parallel or perpendicular. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/analytic-geometry-topic/parallel-and-perpendicular/e/line_relationships?utm_source=YT&utm_medium=Desc...

Khan Academy
Khan Academy
YouTube Video
  • Learn about what an exchange rate is and how to determine the cost of goods in another currency. AP(R) Macroeconomics on Khan Academy: Macroeconomics is all about how an entire nation’s performance is determined and improved over time. Learn how factors like unemployment, inflation, interest rates, economic growth and recession are caused and how they affect individuals and society as a whole. We...

Khan Academy
Khan Academy
YouTube Video
  • After the fall of the Emirate of Diriyah in 1818, in 1824 the second Saudi state known as the Emirate of Nejd is established. It last until 1891 when it fall to the Rashidun tribe. The third Saudi state is then established in 1902 by Abdulaziz which becomes the Kingdom of Saudi Arabia, which became a major player on the global stage with the discovery of major oil reserves in 1938.

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