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): Change in period and frequency from change in angular velocity: Worked examples
A worked example finding the change in the period from the change in angular velocity, and an example finding the change in frequency from …
VideoFree7
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Health and medicine: Pneumonia vs. pneumonitis
Pneumonitis is a term used to describe inflammation of the lung tissues without the presence of an infection, whereas pneumonia is inflamma…
VideoFree9 minutes
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Class 11 Physics (India) - Hindi: Deriving displacement as a function of time, acceleration, and velocity (Hindi)
Deriving displacement as a function of time, constant acceleration and initial velocity. Class 11 Physics (India) - Hindi To help students …
VideoFree7
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Organic chemistry: Cyclic ethers and epoxide naming
Cyclic ethers and epoxide naming. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understandi…
VideoFree8 minutes
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Class 11 Physics (India) - Hindi: Angular momentum (Hindi)
Introducing angular momentum conceptually starting from linear momentum. Also covers some real-life examples. Class 11 Physics (India) - Hi…
VideoFree8
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Electrical engineering: Demo: coin detector
demonstration of a simple coin detector Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We al…
VideoFree1 minute
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Class 11 Physics (India): Derivation of beat frequency formula
In this video David derives the formula for beat frequency. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 p…
VideoFree10 minutes
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Physics: Electrolyte (salt test)
What happens to the deflection when we add salt to an electrolyte? Why? Physics Learn about the basic principles that govern the physical w…
VideoFree1 minute
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Physics: Battery meter (galvanometer)
Simple device which we can use to measure our homemade batteries. You can test it with any household battery first. What does this deflecti…
VideoFree1 minute
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Chemistry: Concentration cell
Concentration cells are galvanic (or voltaic) cells made of two half-cells, each of which containing the same electrodes, but different con…
VideoFree10 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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Physics: Time dilation
We'll start thinking about time dilation in special relativity and how a Loedel diagram can help up appreciate symmetry between inertial fr…
VideoFree9 minutes
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Class 11 Physics (India): Why use I beams in construction?
When constructing buildings, why do we always use beams which have a cross-sectional shape of I? Let's explore this intuitively in this vid…
VideoFree8
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Class 11 Physics (India): Deriving displacement as a function of time, acceleration, and initial velocity
Deriving displacement as a function of time, constant acceleration and initial velocity Class 11 Physics (India) Let's learn, practice, and…
VideoFree10 minutes
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Physics: Galilean transformation and contradictions with light
Here we'll see how classical physics predicts scenarios that disagree with what we observe in nature. Something's got to give… Physics Lear…
VideoFree8 minutes