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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Class 11 Physics (India): Sound Properties: Amplitude, period, frequency, wavelength
How to find the amplitude, period, frequency, and wavelength for a sound wave Class 11 Physics (India) Let's learn, practice, and master to…
VideoFree5 minutes
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Health and medicine: Naming the flu: H-something, N-something
We've all heard of H1N1 or H3N2; now you can understand what all of those names mean and find out why they are helpful in keeping track of …
VideoFree10 minutes
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Class 11 Physics (India) - Hindi: Introduction to Newton's law of gravitation (Hindi)
A little bit on gravity. Class 11 Physics (India) - Hindi To help students who prefer to learn by watching Hindi videos, we've created the …
VideoFree7
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Health and medicine: Neuron resting potential mechanism
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree13 minutes
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Organic chemistry: Nucleophilicity vs. basicity
Nucleophilicity vs. Basicity . The difference between what it means to be a nucleophile and a base Organic chemistry Sal and Jay cover topi…
VideoFree13 minutes
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Health and medicine: Adequacy of the lateral cervical spine X-ray
Dr. Mahadevan from Stanford School of Medicine explains adequacy for lateral cervical (neck) x-rays Health and medicine The medical world c…
VideoFree7 minutes
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Class 11 Physics (India): Race cars with constant speed around curve
When acceleration could involve a change in direction and not speed. Class 11 Physics (India) Let's learn, practice, and master topics of c…
VideoFree5 minutes
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Physics: Are 2 magnets stronger than 1?
Will the power of two magnets stuck together increase the overall force? Why? Physics Learn about the basic principles that govern the phys…
VideoFree1 minute
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Electrical engineering: Integral of sin(mt) and cos(mt)
Integrating sin(mt) and cos(mt) over a full period equals zero. Electrical engineering Learn about electricity, circuit theory, and introdu…
VideoFree6 minutes
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Class 12 Physics (India): Curved surface refraction formula
Let's derive a formula connecting object distance (u) and image distance (v) for refraction at a curved surface. Class 12 Physics (India) I…
VideoFree13
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Class 12 Physics (India): How telescopes work
Let's explore how telescopes work intuitively using a demo. Then we will talk about some nuances involved in drawing ray diagrams and deriv…
VideoFree8
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Class 11 Physics (India): Charles's law
Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting with kinematics and then moving to d…
VideoFree8
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Health and medicine: Diagnosing strokes with imaging CT, MRI, and Angiography
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree10 minutes
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Health and medicine: How HIV kills so many CD4 T cells
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree11 minutes
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Organic chemistry: Acid and base-catalyzed hydrolysis of amides
The mechanisms for acid and base catalyzed hydrolysis of amides. Organic chemistry Sal and Jay cover topics covered in college organic chem…
VideoFree12 minutes