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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Electrical engineering: Mesh current method (steps 1 to 3)
We solve a circuit by writing Kirchhoff's Voltage Law in terms of "mesh currents." This video covers the first three steps out of four. Ele…
VideoFree9 minutes
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Electrical engineering: Impedance vs frequency
The impedance of capacitors and inductors in a circuit depend on the frequency of the electric signal. The impedance of an inductor is dire…
VideoFree9 minutes
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Class 11 Physics (India): Analyzing scalar multiplication
Sal analyzes the magnitude and direction of vectors that are a result of scalar multiplication of a vector whose magnitude is given. Class …
VideoFree5
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Electrical engineering: AC analysis superposition
We break a sinusoidal input voltage into two complex exponentials. Using superposition, we can recover the complex output signals and reass…
VideoFree7 minutes
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Class 11 Physics (India) - Hindi: Work as area under curve (Hindi)
In this video Ram shows how the area under a Force vs. position graph equals the work done by the force and solves some sample problems. Cl…
VideoFree13
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Health and medicine: Lung cancer complications
Learn how the mass of a tumor, the spread of cancer cells, the immune system’s response, and the hormones released from cancer cells contri…
VideoFree8 minutes
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Electrical engineering: Application of the fundamental laws (solve)
We solve the equations created by direct application of the fundamental laws: Ohm's Law and Kirchhoff's Laws. (Part 2 of 2) Electrical engi…
VideoFree9 minutes
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Class 10 Physics (India): Concave mirrors
In this video, we will see how concave mirrors focus a parallel beam of light to a single point. Created by Mahesh Shenoy Class 10 Physics …
VideoFree13
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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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High school biology: Introduction to genetic engineering
Introduction to genetic engineering. Human breeding. Recombinant DNA. Bioethics. High school biology Biotechnology Topic: Science Learn abo…
VideoFree7
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Class 11 Physics (India): Calculus proof of centripetal acceleration formula
Proving that a = v^2/r Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting with kinemati…
VideoFree14 minutes
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Health and medicine: Divided attention, selective attention, inattentional blindness, & change blindness
Learn about divided attention, selective attention, inattentional blindness, & change blindness. By Carole Yue. Health and medicine The med…
VideoFree7 minutes
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Health and medicine: R nought and vaccine coverage
Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (…
VideoFree9 minutes
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Electrical engineering: Sketching exponentials - examples
Sketch exponentials with different time constants Electrical engineering Learn about electricity, circuit theory, and introductory electron…
VideoFree7 minutes
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Class 11 Physics (India): Position vs. time graphs
How to read a position vs. time graph. Using the graph to determine displacement, distance, average velocity, average speed, instantaneous …
VideoFree15 minutes