kentchemistry.com's Videos 71 videos
This video take you through the 50 multiple choice questions and the answers from January's New York State Chemistry Regents Exam. This includes test tips and tricks so you not only pass the exam, you ace it. Here is the link to the exam so you can follow along. The exam *******www.nysedregents****/testing/scire/chem-109/chem-109.pdf Reference Tables *******www.nysedregents****/testing/reftable/archreftable/ChemRef1-7.pdf
  • 8 Aug 2009
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A few really cool close lightning bolts I filmed from my deck. Really cool cloud rotations at the end. Looks like it could be from Hurricane Hanna or Ike .
  • 20 Aug 2008
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A 532nm, 50mW laser is shot through a stream of water. The amazing fiber optic internal reflective properties of water is exposed. Music by Kevin MacLeod
  • 28 Mar 2008
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These cute creatures from Imaginationland are truely evil and are sentenced to the VACUUM CHAMBER. Watch Boyle's Law in action as these marshmallow creatures get what is coming to them.
  • 4 Mar 2008
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'''►► *******Magnet4Power.Net -'''The Levitron spins and surfs on magnetic waves! Pass your hand above, underneath, and around the top. It will continue to spin and float only touching air! The LEVITRON floats free in space, supported only by therepelling magnetic force produced by permanent magnets.
  • 26 Jan 2008
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Watch my heart get broken just in time for Valentines Day. A marshmallow filled chocolate heart is placed into a vacuum and allowed to expand. Then I let my heart get crushed when the air is let back in. Kind of like what happens in life.
  • 24 Jan 2008
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A rattleback, also known as an "anagyre", "celt", "Celtic stone", "rattlerock", "spin bar", "wobble stone" or "wobblestone" and by the product names "ARK," "Bizzaro Swirls," "RATTLEBACKS," "Space Pet" and "Space Toy," is a semi-ellipsoidal top which will spin on its axis in a preferred direction. But, if spun in the opposite direction, it becomes unstable, "rattles", stops and reverses its spin to the preferred direction. This spin-reversal motion seems, at first sight, to violate the angular-momentum conservation law of physics. Moreover, for most rattlebacks, the motion will happen when the rattleback is spun in one direction, but not when spun in the other. These two peculiarities make the rattleback a physical curiosity that has excited human imagination since prehistorical times.
  • 23 Jan 2008
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The "Hot Ice" reaction is amazing, but messy and can only be used once. A great reusable alternative of a supersaturated solution are chemical hot packs that you can buy from a camping store. They contain a solution of sodium acetate that can be reset in less than an hour. They are also good as hand warmers, but why would you buy those?
  • 23 Jan 2008
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'''►► *******Magnet4Power**** - '''Ferrofluid is a magnetic liquid. It is composed of tiny nanoparticles of magnetic material. It flows like a liquid and attracts to a magnet.
  • 23 Jan 2008
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These tops don't work. I should return them. These hemisperical tops flip themselves over and spin. Here is a short video of my inverting spinning top. When spun the top actually will invert itself and spin on the handle. Not a magic trick.
  • 17 Jan 2008
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Sometimes called the Smart Alloy, Muscle Wire or Memory Metal, is an alloy that "remembers" it shape. You can reshape the wire, but when heated it returns to the preset shape. Ever wonder how someone bends a spoon with their mind? Same metal.
  • 15 Jan 2008
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A battery is connected to a nitinol spring and something amazing happens.
  • 15 Jan 2008
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A Discrepant Event is something that will astonish the observer. So how many drops of water can you pile on a penny? It is very incredible. Can you do better? This experiment demonstrates the cohesive forces of water also known as Hydrogen Bonds. These forces are responsible for water forming droplets instead of spreading out.
  • 9 Jan 2008
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A difficult concept for many students to understand is the energy involved in breaking and forming bonds. A hydrate is a substance that has water bonded to it. In order to dehydrate you must add energy (endothermic) to break the bond to water. When hydrating you are forming a bond to water and will release energy (exothermic). This visual demonstration reinforces the concept.
  • 4 Jan 2008
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Please watch and comment on my video lab I created. I am trying to get an idea of how I could use video labs with my chemistry course or website. I guess this would be good for students who are out of school for long periods of time, schools without chemicals, lessons when a teacher is out or something else. Please let me know what you think. About the experiment This experiment is intended to introduce students to hydrated compounds. These compounds have water molecules coordinated in their chemical structures. Examples CuSO4*5H2O, BaCl2*2H2O, and NaC2H3O2*3H2O. Notice each formula has a "*" between the compound's formula and the number of water molecules that are coordinated in the structure. the "*" represents a weak chemical bond known as a hydration bond. This bond is usually easily broken by heating the compound.
  • 4 Jan 2008
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Yes, plasma. You have seen a match make plasma in the microwave. You have seen a compact disc light up. Now you are going to see why it is dangerous to put grapes in the microwave.
  • 31 Dec 2007
  • 39 290
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The heating of water in the microwave can actually be dangerous? Watch the video and see the potential hazzards involved with this everyday activity. Water alone should never be heated in a microwave. Watch and find out why.
  • 25 Dec 2007
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A science experiment for all ages. Keep the kids busy over the holiday. This demonstration will entertain them for hours. You can have fun making one for each of the kids in your family. All you need is a penny and a bottle
  • 24 Dec 2007
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