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Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…

How calcium ion concentration dictates whether a muscle contracts or not. Biology Life is beautiful! From atoms to cells, from genes to pro…

Structure of the endoplasmic reticulum and Golgi body (Golgi apparatus). Their role in protein secretion. Biology Life is beautiful! From a…

Saturated fats, unsaturated fats, and trans fats. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations …

Feedback is the design technique where a part of the amplifier output "feeds back" to the input of the amplifier. The overall effect create…

More reasons why we haven't detected anything yet. Cosmology and astronomy It's a great, big universe out there. In this section of Khan Ac…

LeBron asks Sal why sweating helps cool the body down. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populat…

Example of using the integrated rate law to solve for time and concentration, and calculating the half life for a first-order reaction. Che…

Example of titrating strong acid, hydrochloric acid, with strong base barium hydroxide. How to calculate the unknown concentration when you…

Hank discusses ecosystems, trophic structure, and the flow of energy through food webs. Biology Life is beautiful! From atoms to cells, fro…

Making sure you fully understand titration curves by comparing the initial pH and pH at equivalence point for different types. Chemistry Di…

How to assign cis-trans terminology to double bonds. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course…

Sex-linked traits are associated with genes found on sex chromosomes. In humans, the sex chromosomes are X and Y. Because the X-chromosome …

In this video we show you how to attach Bit-zee's camera and route the wires Electrical engineering Learn about electricity, circuit theory…

Systematic naming of cubane. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of…