Khan Academy: 2757 products
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Health and medicine: What is polycythemia vera?
Learn to recognize the symptoms of polycythemia vera as well as how to diagnosis and treat it. By Raja Narayan. Visit us (http://www.khanac…
VideoFree11 minutes
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Health and medicine: Diagnosing malaria
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree8 minutes
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Health and medicine: What is blood pressure?
Find out what a systolic and diastolic blood pressure mean. Rishi is a pediatric infectious disease physician and works at Khan Academy. He…
VideoFree6 minutes
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Health and medicine: Vaccines and the autism myth - part 2
The infamous Wakefield study kickstarted the Autism Myth, but many studies have since shown that there is no link between the MMR Vaccine a…
VideoFree9 minutes
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Class 11 Physics (India): Multiplying and dividing with significant figures
Learn to multiply and divide with significant figures. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physic…
VideoFree10
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Class 12 Physics (India): Magnetic force on a proton example (part 2)
Sal determines the radius of the circle traveled by the proton in the previous example by using the formula for centripetal acceleration. C…
VideoFree11 minutes
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Class 11 Physics (India): Stellar distance using parallax
Stellar Distance Using Parallax Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting with…
VideoFree12 minutes
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Organic chemistry: Three-dimensional bond-line structures
How to represent three-dimensional molecules using bond-line structures Organic chemistry Sal and Jay cover topics covered in college organ…
VideoFree11 minutes
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Class 12 Physics (India): Photon Energy
In this video, David explains what a photon is and how to determine the energy of a photon. Class 12 Physics (India) It is now time to dive…
VideoFree9 minutes
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Physics: Projectile motion (part 2)
A derivation of a new motion equation Physics Learn about the basic principles that govern the physical world around us. Solid understandin…
VideoFree9 minutes
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Physics: AP Physics 1 review of Centripetal Forces
In this video David explains each concept for centripetal motion and solves an example problem for each concept. Physics Learn about the ba…
VideoFree16 minutes
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Class 11 Physics (India): Work done by isothermic process
Isothermic and adiabatic processes. Calculating the work done by an isothermic process and seeing that it is the same as the heat added. Cl…
VideoFree19 minutes
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Class 11 Physics (India): Sine & cosine identities: symmetry
Sal finds several trigonometric identities for sine and cosine by considering horizontal and vertical symmetries of the unit circle. Class …
VideoFree8
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Class 11 Physics (India): Relative velocity in 2D
How fast is the sheep moving as seen by the lion? In previous videos, we have already seen how to calculate relative velocity in 1D. In thi…
VideoFree9
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Class 11 Physics (India): Newton's Law of Cooling
Newton's law of cooling can be modeled with the general equation dT/dt=-k(T-Tₐ), whose solutions are T=Ce⁻ᵏᵗ+Tₐ (for cooling) and T=Tₐ-Ce⁻ᵏ…
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