Tag results for physics
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Results from all user's collections (855 out of ~855)
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colors of light and their wavelengths - science for kids educational videos by mocomi
Bookmarked 396 weeks ago http:mocomicom presents: the colors of lightin a broad sense of the word sunlight is white the sun emits a spectrum of energy that includesx-ray ultraviolet radiation visible and infrared light and even radio waves the visible light section of sunlight is made up of all the colours of colour spectrum ie a mixture of red orange yellow green blue indigo and violetthe reason we don039t see sunlight as seven colours is because when the wavelengths of the primary colours interact with each other white is produced an easy way to see how this works is with the help of a prism when white light enters a prism it bends and separates due to a phenomenon called dispersion red light has the highest wavelength and therefore a lesser frequency and violet has the oppositeto learn more about the colours of light read: http:mocomicomcolours-of-light for more such cool physics articles and videos visit: http:mocomicomlearnsciencephysics follow mocomi kids |
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paramagnetism of oxygen
Bookmarked 729 weeks ago oxygen gas is condensed into liquid form and then poured between the poles of a strong magnet so we can observe its paramagnetic propertieswe send o2 gas through a copper coil which is then immersed in about 2 liters of very cold--77 degrees kelvin liquid nitrogen as the o2 travels through the coil it loses enough heat to change from a gas to a liquid and that liquid is collected in a small pre-cooled dewar liquid nitrogen is poured between the poles of the permanent magnet but since its diamagnetic properties lead to only a very weak interaction with the field it just sloshes through as if it were water the liquid oxygen on the other hand sticks between the poles of the magnet until it boils away because the oxygen molecule has an electronic structure that favors the non-cancellation of two of the electron spins its net magnetic moment is free to point in the direction of an external magnetic field just as a compass needle does when enough of these moments are aligned the material as a whole behaves like a single magnet at room temperature only a small fraction of the moments are able to line up perfectly with the external field but when oxygen is cooled and condensed into a liquid the effect is more noticeablefor more details on our setup see:http:sciencedemonstrationsfasharvardeduicbicbdokeyword=k16940ampamppanel=icbpagecontent2173903ar2413fname3dindepthhtml2cicbpagecontent2167563ar2413fname3dindepthhtmlampamppageid=icbpage91943ampamppagecontentid=icbpagecontent217390ampampstate=maximizelike us on facebook http:wwwfacebookcomnatscidemos |
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little rolling robot transforms into helicopter
Bookmarked 772 weeks ago learn more: http:spectrumieeeorgautomatonroboticsrobotics-softwarelittle-rolling-robot-transforms-into-helicopter |
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fukushima robot training exercises
Bookmarked 758 weeks ago training of robot operators at japan039s fukushima dai-ichi nuclear power plant read more: http:spectrumieeeorgautomatonroboticsindustrial-robotsfukushima-robot-operator-diaries |
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039the greatest unsolved mysteries of the universe039: dr paul francis at anu march 2010
Bookmarked 758 weeks ago which way do comets tails face does dark matter exist where did the universe come from and what is it made of what039s at the end of the universe dr paul francis discusses some of the 039greatest unsolved mysteries of the universe039 at the australian national university on 31 march 2010this talk will explore the greatest unsolved problems of modern astrophysics describe why they are hard and discuss the efforts being made to solve thempaul francis is an astronomer at the australian national university he conducts research on comets quasars high redshift galaxies and novel interactive teaching techniques he grew up in london studied at cambridge and has worked with the steward observatory in tucson arizona with the university of melbourne and has been based at anu since 1997 |
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micro-robots team up to act like vacuum cleaner
Bookmarked 760 weeks ago micro-robots or quotastersquot designed by argonne national laboratory physicists alexey snezhko and igor aronson pick up free-floating particles this video is courtesy of nature materials |
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mari kimura subharmonics string theory: a revolutionary technique for the violin current
Bookmarked 769 weeks ago in april 1994 at a solo recital given by mari kimura in new york city subharmonics were introduced to the musical community as a revolutionary bowing |
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4th dimension - tesseract 4th dimension made easy - carl sagan - youtube
Bookmarked 270 weeks ago from the epic cosmos by carl sagan: http:amznto2bkhuix us for uk: http:amznto2bnep14 canada: http:amznto2autzu2 this short video clip show |
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optimising a magnetic launcher - youtube
Bookmarked 223 weeks ago offset your carbon footprint with me on wren we039ll plant 10 extra trees for the first 100 people who sign up https:wwwwrencostarttomstanton3d printed |
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what earth would look like with rings like saturn
Bookmarked 754 weeks ago what the rings would look like from different cities and latitudes accross the world it039s interesting to imagine how it would effect culture throughout time it would have influenced religion mythology navigation etccreator - roy prol youtube channel -t0r0yd song- schubert039s ave maria sung by barbara bonneyplease subscribe if you would like to get updated with beautiful videos like this one |
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is pluto a planet
Bookmarked 718 weeks ago the debate over pluto039s planetary state still rages on t-shirts now for sale help support making more videos: http:googlsuqxtthe blog is undergoing a redesign check out the progress so far at: http:cgpgreysquarespacecomblogis-pluto-a-planethtml and let me know what you think of it if you prefer threaded discussion the reddit post is over here: http:wwwredditcomrvideoscommentsua7oianother_awesome_video_from_cgpgrey_is_pluto_aif you would like to help me make more videos please join the discussion on:google: http:plusgooglecom115415241633901418932poststwitter: http:twittercomcgpgreyfacebook: http:wwwfacebookcompagesgreys-blog193301110697381 |
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atom bbc - illusion of reality 16
Bookmarked 785 weeks ago playlist: http:wwwyoutubecomwatchv=n70bcexalwoampampfeature=playlistampampp=9dddef10673906bdampampindex=0ampampplaynext=1in this three-part documentary series professor jim al-khalili tells the story of one of the greatest scientific discoveries ever: that the material world is made up of atoms3 the illusion of realityal-khalili discovers that there might be parallel universes in which different versions of us exist and finds out that empty space isnt empty at all but seething with activity |
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stephen hawking - time traveller039s party
Bookmarked 724 weeks ago stephen hawking hosts a party for future time travelersinto the universe with stephen hawking - time travelthis video belongs to discovery communications and is being used for educational purposes only |