A helen is a humorous unit of measurement based on the concept that Helen of Troy, from the Iliad, had a "face that launched a thousand ships". The helen is thus used to measure quantities of beauty in terms of the theoretical action that could be accomplished by the wielder of such beauty. (Wikipedia).
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A basic understanding of what is meant by a Unit Cell.
From playlist Atomic Structures and Bonding
More Standard Deviation and Variance
Further explanations and examples of standard deviation and variance
From playlist Unit 1: Descriptive Statistics
This video shows how to use unit scale to determine the actual dimensions of a model and how to determine the dimensions of a model from an actual dimensions. http://mathispower4u.yolasite.com/
From playlist Unit Scale and Scale Factor
Ionic Compounds: Writing Chemical Names
How to write chemical names for ionic compounds You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Chemical Equations; Ionic and Covalent Compounds
What Is An Atom - Part 1 | Properties of Matter | Chemistry | FuseSchool
What Is An Atom - Part 1 | Properties of Matter | Chemistry | FuseSchool Learn the basics about the atom, whilst learning about properties of matter. Atoms are the small bits that make up all the matter in the world around us. There are around one hundred different sorts of atom, from th
From playlist CHEMISTRY
How To Name Ionic Compounds In Chemistry
This chemistry video tutorial explains how to name ionic compounds. It includes examples with polyatomic ions and transition metals. My Website: https://www.video-tutor.net Patreon Donations: https://www.patreon.com/MathScienceTutor Amazon Store: https://www.amazon.com/shop/theorganic
From playlist New AP & General Chemistry Video Playlist
Percentiles, Deciles, Quartiles
Understanding percentiles, quartiles, and deciles through definitions and examples
From playlist Unit 1: Descriptive Statistics
Atoms, elements, molecules... What's the difference? This is part 3 in the Stated Clearly series: An Introduction to Chemistry. In it you will find a simplified definition of a molecule, you will learn how we model molecules, and you will see actual images of real molecules and their vibra
From playlist Introduction to Chemistry - Stated Clearly
Helen Keller: Biography of a Great Thinker
Helen Keller (1880-1968) was the first deaf and blind person to earn a Bachelor's degree. Her teacher and companion was Anne Sullivan, and the story of how Sullivan broke through Keller's isolation to teach her language was the subject of the play and Academy Award winning movie "The Mira
From playlist It Starts With Literacy
The Iliad - Prelude to War - Extra Mythology - #1
Watch Extra Mythology ad-free on Nebula! https://go.nebula.tv/extramythology Ah, the myth that launched a thousand ships. The apple thrown into the middle of a greek banquet would ruin lives and lay waste to entire kingdoms. We set the stage for Helen and Paris, two lovers who were not me
From playlist Extra Mythology (ALL EPISODES)
Behind Closed Doors (BAFTA AWARD NOMINATED DOCUMENTARY) | Real Stories
Behind Closed Doors (BAFTA AWARD NOMINATED DOCUMENTARY) | Real Stories With unprecedented access to the Thames Valley Police Domestic Abuse Teams, and the victims of violence they are helping, Behind Closed Doors gives an extraordinary insight into the most common violent crime to take pl
From playlist Award-Winning Documentaries
Britain's Last Witch: Helen Duncan, the Spiritualist Medium
When, in 1941, a medium reveled details of a disaster at sea, the sinking of the HMS Barham, that was supposed to be a secret, Britain tried her under the 1735 Witchcraft Act. The History Guy remembers Helen Duncan, who was the last person imprisoned in the United Kingdom for witchcraft.
From playlist Script by Tracy Douglas
Desire Is the Theme of All Life: Helen Frankenthaler in 1950s New York with Alexander Nemerov
At the dawn of the 1950s, a promising young painter named Helen Frankenthaler, fresh out of college, moved back to New York City, where she grew up. By the decade’s end, she had succeeded in establishing herself as an important American artist of the postwar period. In the years in between
From playlist Stanford Alumni Faculty Talks
From playlist Belong: What It's Like to Live in the Hyphen
What is depression? - Helen M. Farrell
View full lesson: http://ed.ted.com/lessons/what-is-depression-helen-m-farrell Depression is the leading cause of disability in the world; in the United States, close to ten percent of adults struggle with the disease. But because it’s a mental illness, it can be a lot harder to understan
From playlist New TED-Ed Originals
Big Think Interview With Helen Fisher | Big Think
Big Think Interview With Helen Fisher New videos DAILY: https://bigth.ink/youtube Join Big Think Edge for exclusive videos: https://bigth.ink/Edge ---------------------------------------------------------------------------------- A conversation with the biological anthropologist and Rutg
From playlist Helen Fisher | Big Think
Ellipsoids and The Bizarre Behaviour of Rotating Bodies
Derek's video: The Bizarre Behavior of Rotating Bodies, Explained https://www.youtube.com/watch?v=1VPfZ_XzisU Based on this amazing footage: Dancing T-handle in zero-g https://www.youtube.com/watch?v=1n-HMSCDYtM Terence Tao's original answer, with update. https://mathoverflow.net/questio
From playlist Matt and Hugh play with a thing and then do some working out
11. John Barth, Lost in the Funhouse
The American Novel Since 1945 (ENGL 291) In her lecture on John Barth's collection of stories Lost in the Funhouse, Professor Amy Hungerford delves beyond the superficial pleasures and frustrations of Barth's oft-cited metafictional masterwork to illuminate the profound commitment to la
From playlist The American Novel Since 1945 with Amy Hungerford
Atomic mass unit explained and its relationship to the kilogram
The atomic mass unit is a non-SI unit for mass regualrly used in nuclear physics. since it allows for easier comparisons between atoms. I discuss how it came about, how it relates to the kilogram and the eV/c2, and how to use it in nuclear reactions See www.physicshigh.com for all my vi
From playlist Modern Physics
Alfred Lord Tennyson and the Charge of the Light Brigade
On December 9, 1854, Alfred Tennyson, Poet Laureate of the United Kingdom, first published his poem about the Charge of the Light Brigade at the Battle of Balaclava. The poem would become his most famous, and came to represent the challenges of the age, and the life of the poet who became
From playlist Art and history