Enzymes as catalysts for reactions in biological systems; discussion of substrates, active sites, induced fit, and activation energy.
David explains the equation that represents the motion of a simple harmonic oscillator and solves an example problem. Created by David SantoPietro.
How can we communicate in the presence of noise? Created by Brit Cruise.
A cosine wave emerges from Euler's Formula. Music, no narration. Animated with d3.js. Created by Willy McAllister.
Euler's formula relates the complex exponential to the cosine and sine functions. This formula is the most important tool in AC analysis. It is why electrical engineers need to understand complex numbers. Created by Willy McAllister.
A sine wave emerges from Euler's Formula. Music, no narration. Animated with d3.js. Created by Willy McAllister.
Measuring the divisibility of a number. Created by Brit Cruise.
An overview of the different types of evidence that support evolution, including homologous and analogous features and vestigial structures.
A hairy resistance problem. Created by Sal Khan.
Example identifying roles in a food web.
Illustrating the complexity of signal transduction with a MAPK pathway. How mutations in the pathway are linked to cancer.
Example punnet square for sex-linked recessive trait.
Introduction to exocytosis!
Learn about population growth rates and how they can be modeled by exponential and logistic equations.
Using exponential decay equation to solve for relationship between k and half-life. Using semi-log plot to get graph of a straight line with slope of -k. Created by Jay.
Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. Created by Sal Khan.
Introduction to Exponential Decay. Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining . Created by Sal Khan.
Introduction to extranuclear inheritance (part 1).
Introduction to extreme shots and angles.
Understanding how channel proteins and carrier proteins can facilitate diffusion across a cell membrane (passive transport).