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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Organic chemistry: Nomenclature and properties of acyl (acid) halides and acid anhydrides
How to name acyl (acid) chlorides and acid anhydrides and how to analyze their physical properties. Organic chemistry Sal and Jay cover top…
VideoFree10 minutes
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Chemistry: Rate constant k from half-life example
Example problem showing how to find the rate constant k from the half-life of a first order reaction. Chemistry Did you know that everythin…
VideoFree6 minutes
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Organic chemistry: Preparation of sulfides
How to prepare sulfides from thiols. Sulfides are like ethers, but with a sulfur instead of an oxygen atom. Organic chemistry Sal and Jay c…
VideoFree7 minutes
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Organic chemistry: Intro to organic mechanisms
Identifying electrophiles and nucleophiles. Showing movement of electrons using curved arrows. Organic chemistry Sal and Jay cover topics c…
VideoFree12 minutes
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Class 11 Physics (India): Force of friction keeping velocity constant
Calculating the coefficient of kinetic friction (correction made in next video) Class 11 Physics (India) Let's learn, practice, and master …
VideoFree9 minutes
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Class 11 Physics (India) - Hindi: Projectile height given time (Hindi)
Figuring out how high a ball gets given how long it spends in the air. Class 11 Physics (India) - Hindi To help students who prefer to lear…
VideoFree8
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Organic chemistry: Synthesis of alcohols using Grignard reagents I
Synthesis of primary, secondary, and tertiary alcohols from aldehydes and ketones using Grignard reagents. Organic chemistry Sal and Jay co…
VideoFree14 minutes
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Chemistry: Nernst equation
Deriving a few different forms of the Nernst equation, the relationship between Gibbs free energy and reaction quotient Q. Chemistry Did yo…
VideoFree7 minutes
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Chemistry: Solubility from the solubility product constant
Calculating the solubility of copper(II) hydroxide from Ksp using an ICE table. Chemistry Did you know that everything is made out of chemi…
VideoFree9 minutes
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Organic chemistry: R,S system
How to assign the configuration of a chirality center using the R,S system Organic chemistry Sal and Jay cover topics covered in college or…
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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Health and medicine: Membrane potentials - part 2
Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentrat…
VideoFree9 minutes
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Health and medicine: End systolic pressure-volume relationship (ESPVR)
Find out what happens when the left ventricle is not allowed to relax, and instead you simply add and take away blood from it. Rishi is a p…
VideoFree10 minutes
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Electrical engineering: Battery wires
In this video we upgrade Bit-zee' battery wires from 32 gage to 18 gauge. Electrical engineering Learn about electricity, circuit theory, a…
VideoFree3 minutes
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Electrical engineering: What is an operational amplifier?
The "operational amplifier" has two differential inputs and very high gain. Willy describes the symbol and properties of an op-amp. Op-amps…
VideoFree12 minutes