Customary units of measurement in the United States | Units of illuminance | Imperial units
A foot-candle (sometimes foot candle; abbreviated fc, lm/ft2, or sometimes ft-c) is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. Nearly all of the world uses the corresponding SI derived unit lux, defined as one lumen per square meter. The foot-candle is defined as the illuminance of the inside surface of a one-foot-radius sphere with a point source of one candela at its center. Alternatively, it can be defined as the illuminance of one lumen on a one-square foot surface with a uniform distribution. Given the relation between candela and lumen, the two definitions listed are identical, with the second one potentially being easier to relate to in some everyday situations. One foot-candle is equal to approximately 10.76 lux. In many practical applications, as when measuring room illumination, it is often not needed to measure illuminance more accurately than ±10%; in these situations it is sufficient to think of one foot-candle as about ten lux. (Wikipedia).
physics demonstrations Candle oscillator (science experiments)
Physics (la physique)(science experiments)
From playlist MECHANICS
Introduction to Geometer's Sketchpad: Measurements
This video demonstrates some of the measurement and calculation features of Geometer's Sketchpad.
From playlist Geometer's Sketchpad
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From playlist Amazing illusions
Add me on Facebook http://www.facebook.com/brusspup brusspup t-shirts! http://brusspup.spreadshirt.com/ This is a really easy and cool trick to do. Watch toward the end and the candle will spin all the way around. Download the music in this video: http://itunes.apple.com/us/album/end-of
From playlist Cool Science Tricks
Marc Levoy - Lectures on Digital Photography - Lecture 15 (16may16).mp4
This is one of 18 videos representing lectures on digital photography, from a version of my Stanford course CS 178 that was recorded at Google in Spring 2016. A web site that includes all 18 videos, my slides, and the course schedule, applets, and assignments is http://sites.google.com/sit
From playlist Stanford: Digital Photography with Marc Levoy | CosmoLearning Computer Science
Unique at-home Science Experiments! with Physics Girl
Dianna from Physics Girl walks through 5 experiments with jello, lasers, balloons, surface tension, band-aids and candles, with some bonus facts and trivia! If you liked this video check out these other Physics Girl videos: 7 Science Tricks with Surface Tension https://www.youtube.com/wat
From playlist Stuck At Home Experiments
10 Amazing Science Stunts For Parties (1)
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From playlist Science stunts
Smoke from a candle makes a “fuse” that relights it. Parts Needed 1 Candle 1 Lighter
From playlist Flash Science
The tale of the doctor who defied Death - Iseult Gillespie
Dive into the German tale of Godfather Death and his godson, the doctor who tries to master mortality. -- A husband and wife were in despair. The woman had just given birth to their 13th child, and the growing family was quickly running out of food and money. Wandering into the woods, th
From playlist New TED-Ed Originals
Lecture Three: The Chemical History of a Candle - Products of Combustion (4/6)
Bill Hammack presents Lecture Three of Michael Faraday’s lectures on The Chemical History of a Candle. A free companion book helps modern viewers understand each lecture — details at http://www.engineerguy.com — as does a commentary track and closed captions for each lecture. ►Free Compan
From playlist Michael Faraday's The Chemical History of a Candle
Candles at Halloween - Periodic Table of Videos
Did you realise modern candle wicks are a marvel of engineering? The Professor takes a look at candle chemistry in this special video for Halloween. More links in description below ↓↓↓ Support Periodic Videos on Patreon: https://www.patreon.com/periodicvideos A video on every element: h
From playlist Halloween Videos - Periodic Videos
DIY FIBER OPTIC mineral oil fire starter from liquid fibre optic lighting SPHERICAL
Mineral oil is used for optical fiber and a liquid fire starter. Works goo for DIY fiber optic cable. http://greenpowerscience.com/ A gallon cost about $20 and can be purchased from feed stores. This inexpensive option allows for larger diameter PVC tube lights.
From playlist FIRE FROM WATER AQUA SOLAR COLLECTOR WATER BOTTLE FIRE
Citronella, Poison Potato Salad, and other Summer Myths
Warm weather is finally here. Time to bust some summer myths here at Healthcare Triage. If you would like references, help on getting them is here: http://theincidentaleconomist.com/wordpress/?p=56275 John Green -- Executive Producer Stan Muller -- Director, Producer Aaron Carroll -- Wri
From playlist Healthcare Triage
Alkanes: Crash Course Organic Chemistry #6
Alkanes are kind of the wallflowers of organic chemistry, but they still have important functions in the world around us. In this episode of Crash Course Organic Chemistry we’re building our knowledge of organic molecules by learning all about these so called couch potatoes from how they a
From playlist Organic Chemistry
Year of BeeKeeping Episode 48, Rendering Wax
I render down my supply of wax in preparation for a candle making workshop i am putting on.
From playlist BeeKeeping
Best Conservation of Mass Experiment EVER!(maybe)
The IRON (Fe) in steel wool reacts with the OXYGEN (O2) in the air in a mesmerizing reaction that changes the mass in unexpected ways while the steel wool burns in this weird combustion reaction. Fun Full Video looking at Steel Wool Mass Change https://youtu.be/_2mgYGwl9RM #FlemdogScienc
From playlist Shorts