30 November 2015
Phosphorus, like carbon and sulfur, exists in a variety of different forms that all possess the same chemical composition but have slightly different structures (allotropes). Red phosphorus is an allotrope of phosphorus that is less flammable than the notorious white phosphorus and much more stable at room temperature.
A glass flask is filled with oxygen gas and a piece of red phosphorus is ignited and lowered inside. As the red phosphorus burns, it produces a cloud of phosphorus pentoxide (P4O10) that quickly fills the glass container. As the flame is obscured, the burning red phosphorus at the center makes the smoke look similar to that of glowing star.
Source: http://www.rsc.org/eic/2015/11/red-phosphorus-oxygen-sun
#ScienceGIF #Science #GIF #Phosphorus #Chemistry #WhitePhosphorus #Sun #Glowing #Flask
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28 November 2015
The wireless transmission of power is an extremely popular concept for many future technologies. This simple demonstration of resonant inductive coupling shows the near-field transmission of electrical energy between two magnetically coupled coils.
As the receiver coil (left) is brought closer to the transmission coil (right), the attached LED glows more brightly. However, if the coil is turned perpendicularly to the magnetic field, the transmission of energy is interrupted.
The technique was first demonstrated by Nikola Tesla in 1894 by wirelessly illuminating lamps in the 35 South Fifth Avenue laboratory. The Tesla Coil was a product of his research into “electro-dynamic induction.”
Source: https://youtu.be/r1UT4NuygmQ
#ScienceGIF #Science #GIF #Electricity #Power #Electromagnetism #EM #Physics #Electronics #Light
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27 November 2015
Hydrophobic materials lack attraction to water and therefore appear to actively repel contact with water. The right side of this cinder block is coated in a commercial hydrophobic material to waterproof it. The beading of water is characteristic of the high contact angle of water interacting with a hydrophobic surface.
Source: https://youtu.be/IPM8OR6W6WE
#ScienceGIF #Science #GIF #Chemistry #Surface #Hydrophobic #Superhydrophobic #Coating #Material #MaterialScience #Liquid #Water
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26 November 2015
Deep-frying turkey is a popular cooking method across the United States because it takes a relatively short amount of time to cook compared to roasting. However, every year there are many explosions and fires caused by improper use of the deep fryer.
The most common causes for these fires is overfilling the pot and failing to thaw a frozen turkey. Many people forget to account for the displacement of the boiling oil when the turkey is introduced to the pot, which results in oil spilling out of the pot onto the open flame.
An improperly thawed or wet turkey can result in a boiling liquid expanding vapor explosion (BLEVE). Water coming into contact with the boiling oil will immediately vaporize and rapidly expand outwards, spraying oil everywhere. This has a similar effect to dumping water on an oil fire (don’t do it).
Always be sure to have the appropriate fire extinguisher present.
Source: https://youtu.be/4PntrFHDwqA
#ScienceGIF #Science #GIF #Thanksgiving #Fryer #DeepFryer #Turkey #Cooking #Fire #Danger #Water #Oil
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23 November 2015
Fire Whirls (also known as Fire Tornados) are whirlwinds made up of flame and ash that are induced by intense fire and turbulent wind conditions. This Slow Mo Guys video uses angled box fans to swirl a kerosene fire into a vertical column of flame. Naturally occurring fire whirls can last for hours, have wind speeds reaching 100mph, and are impossible to extinguish because of the intense surrounding fire. In 1923, the city-wide firestorm after the Great Kantō earthquake in Japan resulted in catastrophic fire whirls directly responsible for significant loss of life.
Source: https://youtu.be/QwoghxwETng (The Slow Mo Guys)
#ScienceGIF #Science #GIF #SlowMotion #SlowMoGuys #Aliasing #Tornado #Whirl #Vortex #Fire #SlowMo #HFR
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20 November 2015
Aluminium is the third most abundant element in the Earth’s crust and so highly reactive that native aluminium is actually quite rare. When exposed to air, a thin layer of aluminium oxide forms on the surface and prevents further reaction.
In this experiment, a solution of copper(II) chloride and hydrochloric acid is poured over a piece of aluminium foil. The chloride ions disrupt the aluminium oxide layer and react with the raw aluminium metal to produce hydrogen gas. Igniting the gas results in an eerie green flame caused by the copper released during the reaction.
Source: http://www.rsc.org/eic/2014/09/aluminium-oxide-chloride-reaction
#ScienceGIF #Science #GIF #Chemistry #Reaction #rxn #Aluminium #AluminiumOxide #Chloride #Flame #Gas #Hydrogen
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19 November 2015
Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless gas with a density of 6.12g/L, which is ~5x higher than that of air (1.225g/L). When mixed with air, sulfur hexafluoride will sink to the bottom much like water mixed with oil. The bubbles, which are filled with air, therefore float on top of the sulfur hexafluoride filled aquarium.
Source: https://youtu.be/GutiNPwzUA8
#ScienceGIF #Science #GIF #Density #SulfurHexafluoride #SF6 #Bubbles #Floating #Physics #Chemistry
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17 November 2015
Caesium is a soft, silvery-gold alkali metal (Z55) that reacts violently when exposed to water to form caesium hydroxide (CsOH). In this example, phenolphthalein has been added to the water bath to highlight the resulting change in pH. Because caesium hydroxide is a strong base, it causes the phenolphthalein indicator to change colors to a vivid pink/purple.
Source: https://youtu.be/_zPH0rdZrJY
#ScienceGIF #Science #GIF #Caesium #Reaction #Water #Alkali #phenolphthalein #pH #Base
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13 November 2015
Scientists have developed an ultrasonic levitation system that allows for contactless 3D manipulation of objects. By carefully manipulating the sound emanating from an array of speakers, it is possible to localize the resulting pressure interference pattern to levitate small beads.
Source: https://youtu.be/6hE6KjLUkiw (Nature)
#ScienceGIF #Science #GIF #Levitation #Sound #Acoustics #3D #Control #Nature #Physics #Interference #Constructive #Destructive
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30 October 2015
Mixing a ferrofluid with the contents of a glow stick can produce some beautiful glow-in-the-dark shapes. A ferrofluid is a liquid that becomes strongly magnetized in the presence of a magnetic field and is typically composed of ferromagnetic (iron) particles suspended in oil. The complex orientation of the ferrofluid visualizes the magnetic field around a nearby magnet.
Source: https://youtu.be/RtBtD0_KZ9o (Physics Girl)
#ScienceGIF #Science #GIF #Physics #Ferrofluid #Glowstick #Magnets #Magnetic #Luminescence #Glow #Pretty #Lights #PhysicsGirl
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