In this animation produced by WGBH and Digizyme, Inc., see how molecules …
In this animation produced by WGBH and Digizyme, Inc., see how molecules of DNA are separated using gel electrophoresis, and how this process enables scientists to compare the molecular variations of two or more DNA samples.
An emf induced by motion relative to a magnetic field is called …
An emf induced by motion relative to a magnetic field is called a motional emf. This is represented by the equation emf = LvB, where L is length of the object moving at speed v relative to the strength of the magnetic field B.
Using Balmer-Rydberg equation to solve for photon energy for n=3 to 2 …
Using Balmer-Rydberg equation to solve for photon energy for n=3 to 2 transition. Solving for wavelength of a line in UV region of hydrogen emission spectrum. Created by Jay.
Starting with the reign of Augustus and ending with the reign of …
Starting with the reign of Augustus and ending with the reign of Marcus Aurelius, the Pax Romana is a relatively stable 200 year period. The first five emperors are of the Julio-Claudia Dynasty. The last five of the Pax Romana are considered the "good" emperors by Machiavelli.
Mia Epner, who works on security for a US national intelligence agency, …
Mia Epner, who works on security for a US national intelligence agency, explains how cryptography allows for the secure transfer of data online. This video explains 256-bit encryption, public and private keys, SSL & TLS and HTTPS.
Scientists discuss whether or not endocrine disrupting chemicals, which may cause birth …
Scientists discuss whether or not endocrine disrupting chemicals, which may cause birth defects and other health concerns, should be controlled in the absence of conclusive proof, in this video segment adapted from FRONTLINE: Fooling with Nature.
The theory of how mitochondria, chloroplasts and other membrane-bound organelles in eukaryotic …
The theory of how mitochondria, chloroplasts and other membrane-bound organelles in eukaryotic cell likely arose from a symbiosis between aerobic prokaryotes and host anaerobic eukaryotic ancestors. Developed by Lynn Margulis.
Watch students as they conduct an energy audit on a home and …
Watch students as they conduct an energy audit on a home and gain hands-on experience for a career in the green energy industry, in this video adapted from ATETV.
Sal graphs elastic potential energy and kinetic energy for a mass on …
Sal graphs elastic potential energy and kinetic energy for a mass on a spring and compares the total energy when with and without dissipative forces (friction).
England didn't start its first successful colony in North America until 1607, …
England didn't start its first successful colony in North America until 1607, more than 100 years after Columbus arrived in the New World. In this video, Kim discusses the problems that prevented England from following in Spain's footsteps, including struggles for the throne, war in Ireland, and economic depression.
Enhancing French skills is a website for intermediate learners of French. It …
Enhancing French skills is a website for intermediate learners of French. It includes authentic language videos from French websites, as well as interviews of French speakers on cultural topics. Videos and activities are organized into five broad themes and tagged by communicative language function with links into Tex’s French Grammar for specific grammar explanations and interactive exercises. Each theme includes a pdf of suggested classroom activities and homework.
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