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 valvular heart disease?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree11 minutes
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Organic chemistry: Naming alkenes examples
Naming Alkenes Examples Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of basi…
VideoFree8 minutes
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Health and medicine: Hypertension symptoms and categories
Learn the most common symptoms (or lack thereof!) and the two major categories of hypertension. Rishi is a pediatric infectious disease phy…
VideoFree8 minutes
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Organic chemistry: Introduction to infrared spectroscopy
Basic principles of spectroscopy. Light absorption and bond vibration. Organic chemistry Sal and Jay cover topics covered in college organi…
VideoFree9 minutes
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Class 11 Physics (India): Worked example: finding unit vector with given direction
Learn what a unit vector is and how to find a unit vector in the direction of a given vector. Class 11 Physics (India) Let's learn, practic…
VideoFree5
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Class 11 Physics (India): Four fundamental forces
Gravity, Weak, Electromagnetic and Strong Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) sta…
VideoFree10 minutes
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Physics: Visualizing multiple Newtonian path–time diagrams
Now that we know what path–time diagrams are, let's see what happens when we bring along a friend! Physics Learn about the basic principles…
VideoFree10 minutes
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Class 12 Physics (India): Total internal reflection
Critical incident angle and total internal reflection Class 12 Physics (India) It is now time to dive deeper into the world of physics with…
VideoFree8 minutes
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Physics: Projectile motion (part 5)
How fast was the ball that you threw upwards? Physics Learn about the basic principles that govern the physical world around us. Solid unde…
VideoFree10 minutes
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Health and medicine: Clonal selection
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree10 minutes
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Health and medicine: Decay and interference
Learn about decay and interference in human memory. Health and medicine The medical world can be a confusing place. Patients, their familie…
VideoFree5 minutes
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Class 12 Physics (India): Minority charge carriers in extrinsic semiconductors
When we add impurities to semiconductors, what happens to minority charge carriers? Do they remain the same? In this video, we will explore…
VideoFree12
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Health and medicine: Heart failure treatment - Devices and surgery
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree5 minutes
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Physics: Question 4: 2015 AP Physics 1 free response
Identical spheres falling from the same height with different horizontal velocities. Physics Learn about the basic principles that govern t…
VideoFree11 minutes
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Health and medicine: Baby circulation right after birth
Watch how the blood flows through the baby's circulation and compare it to what happens in the fetus. Rishi is a pediatric infectious disea…
VideoFree13 minutes