Crash Course Chemistry #14 - Real Gases
via thecrashcourse:
Hank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren’t all that constant; how the ideal gas law we’ve spent the past two weeks with has to be corrected for volume because atoms and molecules take up space and for pressure because they’re attracted to each other; that Einstein was behind a lot more of what we know today than most people realize; and how a Dutch scientist named Johannes van der Waals figured out those correction factors in the late 19th century and earned a Nobel Prize for his efforts.
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Sick Science! #144 - Salt Water Density Straw
Density can be a difficult scientific property to grasp, that’s why we like making it colorful, fun, and (most importantly) simple! The Salt Water Density Straw is the epitome of kitchen science. You’ll use materials are right in your house, and with just a bit of salt, you’ll create a colorful experience that will have young scientists understanding density in moments.
Click here to get the secret: http://www.stevespanglerscience.com/experiment/density-straw
Disappearing Smoke - Science Trick
This is an awesome science trick where we make all the smoke inside a bottle disappear in a second. Let us know if you have some science tricks of your own you would like to see done.
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via Household Hacker.
Amazing NEW Periodic Table Song & Video!
If the Animaniacs and Science had a child, this would be it! Every element of the Periodic Table, sung, in order!
Written, Directed, Produced, Edited and Sung by Mitchell Moffit. Based on the “Can-Can” music, by Offenbach.
Sick Science! - Exploding Bubbles
The term “burst your bubble” takes on a whole new meaning when our science guy, Steve Spangler, is invited to the play date. It’s probably safe to bet that these are no ordinary bubbles, but it’s also no ordinary problem that we’re facing with rising carbon dioxide levels in our atmosphere.
via Spangler Science TV.
Boiling Water - Periodic Table of Videos
This video features Martyn Poliakoff, Samantha Tang and Neil Barnes.
Thanks to Buddhi Rai and Chandra Rai for all theri help with the Everest boiling.
via Periodic Videos.
5 things you should never do with a particle accelerator
Suzie Sheehy is a researcher and science communicator who specialises in particle physics and accelerator physics.
She was one of many big names who gave talks at the IOP’s Physics in Perspective event at the Royal Institution of Great Britain in 2013.
Find out more: http://www.iop.org/education/teacher/extra_resources/perspective/page_41717.html
Duration: 36:36
via Institute of Physics.
Sick Science! #143 - Candy Science
M&Ms have the slogan of melting in your mouth, but not in your hands. You wanna know something cool? The special melting property is totally scientific. The results are an amazing phenomenon that we call Floating Letters.
To Discover Why This Happens:
http://www.stevespanglerscience.com/experiment/floating-letters
Ideal Gas Problems
via thecrashcourse:
We don’t live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas law (like our culture) has unrealistic expectations when it comes to size and attraction: it assumes that particles do not have size at all and that they never attract each other. So the ideal gas “law” often becomes little more than the ideal gas estimate when it comes to what gases do naturally. But it’s a close enough estimate in enough situations that it’s very valuable to know. In this episode, Hank goes through a bunch of calculations according to the ideal gas law so you can get familiar with it.
The Spangler Effect - Cloud in a Bottle Season
On this episode of The Spangler Effect, Steve shows a few ways to make a cloud appear inside a bottle and talks about temperature inversions that happen in big cities.
via The Spangler Effect.
Water Boiling at Everest - Periodic Table of Videos
Boiling water at various altitudes on the trek from Lukla to Everest Base Camp.
More scenic clips from Brady’s trip: http://bit.ly/12di1M8
Special thanks to Buddhi Rai and Chandra Rai
Music by: http://www.youtube.com/alankey86
via Periodic Videos.
Science Project: Coffee
Here’s the scoop on coffee’s flavor: the taste comes from compounds locked into roasted coffee beans. Add hot water, and those flavors escape into your pot — but not all flavors escape at the same time, says Harold McGee, food science writer and author of On Food and Cooking. For example, sour flavors, acids, come first and the plant carbohydrates responsible for coffee’s body come later. Taste for yourself with this counter-top chemistry experiment.
via Science Friday.
Acid Breath
Demonstrating the acidification of a solution by simply breathing into it! It’s also how acid rain forms!
via Mark Rosengarten.
Crash Course Chemistry #12 - The Ideal Gas Law
via thecrashcourse:
Gases are everywhere, and this is good news and bad news for chemists. The good news: when they are behaving themselves, it’s extremely easy to describe their behavior theoretically, experimentally and mathematically. The bad news is they almost never behave themselves.
In this episode of Crash Course Chemistry, Hank tells how the work of some amazing thinkers combined to produce the Ideal Gas Law, how none of those people were Robert Boyle, and how the ideal gas equation allows you to find out pressure, volume, temperature or number of moles. You’ll also get a quick introduction to a few jargon-y phrases to help you sound like you know what you’re talking about.
What is Freezer Burn?
Why do ice cubes shrink, ice cream get frosty, and vegetables dry out in the freezer? FREEZER BURN!
References:
Frost flowers: http://www.itg.cam.ac.uk/people/grae/90.pdf
Freezer burn: http://dft.ba/-freezerburnMinuteEarth provides an energetic and entertaining view of trends in earth’s environment — in just a few minutes!
Created by Henry Reich, with Alex Reich, Peter Reich, Rose Eveleth, Emily Elert, and John Guittar.
Music by Nathaniel Schroeder: http://www.soundcloud.com/drschroeder
Thanks to ScienceAlert for support - http://www.sciencealert.com
via Minute Earth.
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