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: Drug dependence and homeostasis
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree3 minutes
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Chemistry: Bond enthalpy and enthalpy of reaction
Introduction to bond enthalpy, and how to use bond enthalpies to calculate enthalpy of reaction. Chemistry Did you know that everything is …
VideoFree12 minutes
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Health and medicine: Putting it all together: Pressure, flow, and resistance
See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disea…
VideoFree12 minutes
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Organic chemistry: Dot structures I: Single bonds
How to draw single bonds using dots to represent valence electrons. Organic chemistry Sal and Jay cover topics covered in college organic c…
VideoFree7 minutes
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Biology: Vascular plants = Winning!
Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tre…
VideoFree11 minutes
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Health and medicine: Heart cells up close!
Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pe…
VideoFree14 minutes
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Health and medicine: Piaget's stages of cognitive development
Learn about the stages and developmental milestones in Piaget's theory of cognitive development. Health and medicine The medical world can…
VideoFree6 minutes
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Class 12 Physics (India): Bohr model energy levels (derivation using physics)
Using classical physics to calculate the energy of electrons in Bohr model. Solving for energy of ground state and more generally for level…
VideoFree12 minutes
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Class 12 Physics (India): Why atomic theory doesn't work for solids
To understand what happens in a solid we need to go quantum! We have already studied, how electrons fill up an atom in discrete energy leve…
VideoFree9
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Class 11 Physics (India) - Hindi: Vertical springs and energy conservation (Hindi)
In this video, Ram explains two different strategies to deal with vertical springs and compares them with those used for horizontal springs…
VideoFree19
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Class 12 Physics (India): Transistor as a voltage amplifier
We will explore what it means to amplify a signal mathematically, and then see how our transistor does voltage amplification. We will also …
VideoFree12
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Class 11 Physics (India) - Hindi: Free body diagram with angled forces worked example (Hindi)
Ram draws a free body diagram for a box held stationary against a wall with a force at an angle theta. Class 11 Physics (India) - Hindi To …
VideoFree6
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Class 11 Physics (India) - Hindi: Treating systems the easy way (Hindi)
Ram shows the easier way to find the acceleration of two masses connected by a rope. Class 11 Physics (India) - Hindi To help students who …
VideoFree14
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Class 11 Physics (India) - Hindi: Three box system problem (Hindi)
In this video Ram explains how to easily find the acceleration of a three box system by treating it as a single mass. Class 11 Physics (Ind…
VideoFree9
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Class 11 Physics (India): Absolute temperature and the kelvin scale
Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting with kinematics and then moving to d…
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