11 July 2016
Dropping a piece of burning iron wool into liquid oxygen produces a violent chemical reaction. Almost all of the iron is consumed in the exothermic reaction with oxygen to produce a mixture of iron oxides. The small pieces of iron particulates glow brightly as the reaction proceeds.
The reaction is a little contradictory since liquid oxygen is extremely cold (-186°C) and the burning metal is extremely hot. One would expect the metal to cool upon coming into contact with the liquid yet in reality it actually heats up as the reaction begins.
Source: https://youtu.be/6NNt0Pup6jU
#ScienceGIF #Science #GIF #Iron #Oxygen #LiquidOxygen #Liquid #Burning #Chemistry #Physics #Periodic
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10 July 2016
The homopolar motor is the simplest electric motor that uses direct current to power rotational movement. It was first built and demonstrated by Michael Faraday in 1821 at the Royal Institute in London. The name “homopolar” is used because the polarity of the magnetic field emitted by the conductor and the permanent magnets does not change (unlike conventional DC motors).
The resulting rotational movement of the copper conducting wire is caused by the Lorentz force. A conductor (the wire) with a current flowing through it (from the battery) that is placed in a magnetic field (from the magnet) perpendicular to the current experiences a force in the direction perpendicular to both the magnetic field and current. This force provides torque around the axis of rotation and causes the conducting wire to spin.
Put more technically, the Lorentz force is the combination of electric and magnetic force on a point charge. If a particle with charge q moves with velocity v in the presence of electric field E and a magnetic field B , then it will experience the force F = q E + q v x B.
Source: https://youtu.be/wUqbvHOW6Us
#ScienceGIF #Science #GIF #Motor #Physics #Magnetism #Magnetic #Magnet #Battery #Electricity #Electromagnetism #EM #Cooper #Wire #Polar #Polarity
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5 July 2016
A gyroscope is a spinning wheel or disc in which the axis of rotation is free to assume any orientation by itself. This means that when the disc is rotating, the axis is unaffected by tilting or rotation of the mounting because of the conservation of angular momentum.
A CD player contains a rapidly spinning compact disc (200-500rpm) that acts as a gyroscope in the microgravity of the International Space Station. The first CD player touched by the astronaut is off , so it readily tumbles in the direction of the applied force. However, the second CD player is on , so the spinning disc acts as a gyroscope that stabilizes the CD player and prevents it from tumbling. If you watch the full video, you’ll see experiments conducted with two and three CD players taped together to achieve a higher dimension of stability.
Source: https://youtu.be/aXgGQuaOOt4
#ScienceGIF #Science #GIF #Physics #Gyroscope #Stabilization #Space #OuterSpace #Microgravity #ISS #NASA #CD #Astronaut #Rotation #Momentum
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4 July 2016
NASA’s Juno spacecraft is hours away from beginning its orbital insertion around the planet Jupiter. After almost 5 years of travel the spacecraft will enter polar orbit around the largest planet in our Solar System where it will orbit 37 times over the course of its 20-month mission. Juno will study Jupiter ‘s composition, gravity field, magnetic field, and polar magnetosphere at the highest resolution to date.
Source: https://youtu.be/dplSgv6qlMk (NASA)
#ScienceGIF #Science #GIF #NASA #Juno #Jupiter #Satellite #Orbit #Probe #Space #Exploration #Atmosphere #Orbital #Polar #Magnetosphere #Gravity #Jovian #Planet #SolarSystem
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30 June 2016
This imagery captured by the Hubble Space Telescope on May 19, 2016, depicts bright auroras on the planet Jupiter. Auroras are produced by the interaction of a planet’s magnetic field with its atmosphere and the stream of charged particles emitted by the Sun (solar wind). These auroras are over a thousand times brighter than those seen on Earth and were captured using Hubble’s far-ultraviolet-light detector. NASA was imaging Jupiter ahead of the July 2016 arrival of its Juno spacecraft that is scheduled to study the magnetic field of the largest planet in our Solar System.
The full-color footage of Jupiter was photographed at a different time as part of Hubble’s Outer Planet Atmospheres Legacy (OPAL) program, that annually captures global maps of the outer planets.
Source: https://youtu.be/dplSgv6qlMk (NASA)
Learn More: http://goo.gl/e1SEiy
#ScienceGIF #Science #GIF #NASA #ESA #Hubble #Jupiter #Aurora #Particles #Charge #MagneticField #Sun #Solar #Telescope #Satellite #Space #OuterSpace #Planet #Physics #Astrophysics #Astronomy #SolarWind
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29 June 2016
NASA launched the Juno spacecraft from Cape Canaveral on August 5, 2011. This marked the beginning of its five year, 2.8 billion kilometer journey to the planet Jupiter. After release from the Atlas V rocket high above Earth ‘s atmosphere, three large solar panel arrays were unfurled to power the spacecraft. These are the largest solar arrays ever used for a planetary probe, which typically are powered by radioactive thermoelectric generators.
Juno will begin orbital insertion around Jupiter on July 4, 2016, by firing its engines to slow the spacecraft. After two 53-day orbits, the engines will be fired again to move the spacecraft to 14-day polar orbits where its primary scientific mission will begin. Onboard equipment will study Jupiter ‘s composition, gravity field, magnetic field, and polar magnetosphere with the goal of learning more about the formation of the largest planet in our Solar System. The mission is scheduled to end in February 2018 when Juno will be de-orbited to burn up in Jupiter ‘s outer atmosphere.
The spacecraft is named after the Roman goddess Juno, the wife of the sky and thunder god Jupiter. When he used a veil of clouds to mask his mischief, Juno was still able to peer through and see Jupiter’s true nature.
Source: https://youtu.be/NNHfoNIiZ8Y (NYTimes)
Learn More: https://goo.gl/93vXwM
#ScienceGIF #Science #GIF #NASA #JPL #Juno #Space #Spacecraft #Telescope #Jupiter #SolarSystem #Exploration #Discovery #Imaging #Mapping #Map #Rocket #NYT #NewYorkTimes
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28 June 2016
Polyethylene oxide (PEO) is a polymer compound created from ethylene oxide monomers (C2H4O) with numerous applications ranging from industrial manufacturing to medicine. The long polymer chains interact with each other and become entangled, which allows for the “self-pouring” behavior. The attraction between the chains is sufficient for the polymer to act as a continuous strand, so once the beaker is tipped the polymer continues to pull itself out (similar to the self-siphoning beads).
Source: https://youtu.be/bOSVX8zOPkc (Steve Mould)
#ScienceGIF #Science #GIF #Liquid #PolyethyleneGlycol #PolyethyleneOxide #Polymer #Pouring #Physics #Chemistry
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23 June 2016
Destin over on the SmarterEveryDay +YouTube channel created a transparent potato cannon for the purpose of visualizing the explosion taking place within the tube. He moved the ignition to the center of the transparent window so the combustion was more easily observed.
The resulting slow motion video captured at 20,000 frames-per-second reveals the expanding fireball within the tube. As the aerosol propellent combusts, it causes a rapid increase in pressure that eventually forces the potato out of the barrel.
Source: https://youtu.be/_TNSUIsjdpY (SmarterEveryDay)
#ScienceGIF #Science #GIF #PotatoGun #Potato #Gun #Explosion #SlowMotion #Slow #Motion #SlowMo #Fire #Gas #Smoke #Flame
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22 June 2016
Ferrofluid is a liquid that becomes strongly magnetized in the presence of a magnetic field. It is typically composed of ferromagnetic (iron) particles suspended in oil. When exposed to a magnet, the particles align with the surrounding magnetic field. The complex orientation of the ferrofluid reveals the magnetic field around the two magnets.
Source: https://youtu.be/U8SxLrh8WZQ
#ScienceGIF #Science #GIF #Ferrofluid #Magnet #Magnetic #Fluid #Iron #Particles #Align #Field #Metal #Magnetism
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16 June 2016
An object sitting on the Earth experiences one unit of g-force via the mechanical force exerted in the upward direction by the ground. G-force is a measurement of the type of acceleration that causes weight and is not an actual force.
As this fighter jet performs a barrel roll, centripetal acceleration (not centrifugal) causes around 2 units of g-force directed towards the center of the loop when the plane is completely inverted. This means that the downwards acceleration caused by gravity is overcome by the centripetal acceleration that is pointing upwards when the plane is inverted. This means that the pilot and the water is experiencing one net unit of g-force, allowing it to be poured as if sitting upright on the ground.
Source: https://youtu.be/KeFFLdyChWQ
#ScienceGIF #Science #GIF #Physics #Mechanics #Water #Centripetal #Acceleration #FighterJet #Jet #Plane #BarrelRoll #Roll #Gravity #Force #Loop #G-Force #GForce
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