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Greta Oppe

The properties of solids, liquids and gases - ABPI - Resources for Schools - 64 views

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    One of many resources at ABPI
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    Animation: The properties of solids, liquids and gases
Martin Burrett

Charactistics of Matter - 119 views

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    A superb interactive science video from the BBC about the charactistics of matter, featuring solids, liquids and gases. http://ictmagic.wikispaces.com/Science
dpurdy

Hydrogen vehicle - Wikipedia, the free encyclopedia - 13 views

    • dpurdy
       
      Is hydrogen sustainable? depends on the source. see this highlight.
  • While methods of hydrogen production that do not use fossil fuel would be more sustainable
  • The challenges facing the use of hydrogen in vehicles include production, storage, transport and distribution.
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  • The hydrogen infrastructure consists mainly of industrial hydrogen pipeline transport and hydrogen-equipped filling stations like those found on a hydrogen highway. Hydrogen stations which are not situated near a hydrogen pipeline can obtain supply via hydrogen tanks, compressed hydrogen tube trailers, liquid hydrogen tank trucks or dedicated onsite production.
  • Hydrogen use would require the alteration of industry and transport on a scale never seen before in history. For example, according to GM, 70% of the U.S. population lives near a hydrogen-generating facility but has little access to hydrogen, despite its wide availability for commercial use.[64] The distribution of hydrogen fuel for vehicles throughout the U.S. would require new hydrogen stations that would cost, by some estimates approximately 20 billion dollars[65] and 4.6 billion in the EU.[66] Other estimates place the cost as high as half trillion dollars in the United States alone.[67]
  • Hydrogen fuel does not occur naturally on Earth and thus is not an energy source, but is an energy carrier. Currently it is most frequently made from methane or other fossil fuels. However, it can be produced from a wide range of sources (such as wind, solar, or nuclear) that are intermittent, too diffuse or too cumbersome to directly propel vehicles. Integrated wind-to-hydrogen plants, using electrolysis of water, are exploring technologies to deliver costs low enough, and quantities great enough, to compete with traditional energy sources.[2]
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    Fuel cell cars are expensive.  The fuel cell costs a lot
Gerald Carey

Liquid Splashes - a set on Flickr - 78 views

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    Unbelievable range of photos of water droplets and the resultant splashes photographed at high speed.
Martin Burrett

Real Life Maths: Potions Lesson by @PrimaryLessons - 41 views

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    "This is a really good way of testing out practical measuring skills in Maths lessons. I always teach 'measuring' by incorporating a Harry Potter themed Potions lesson. Pupils follow potion recipes to create potions from the Harry Potter universe, e.g. Polyjuice Potion or Skele-gro. I have a mixture of powders (cornflour), plants (herbs) and potions (water with food colouring). I then have pipettes, a range of different containers with different scales for measuring liquids, scales for measuring the plants and powders, in addition to gloves for handling the 'poisonous' plants, a pestle and mortar for the plants and stopwatches for timing."
Jac Londe

Startup turns carbon dioxide into fuels - 1 views

  • Today, carbon dioxide (CO2) is a hot topic. Scientists around the globe are searching for ways to store, dispose of, or prevent the formation of the greenhouse gas, which is a major driver of global climate change. Liquid Light hopes to take this concept one step further and harness waste CO2 as a source of carbon to make industrial chemicals and fuels.
  • Take CO2 and mix it in a water-filled chamber with an electrode and a catalyst. The ensuing chemical reaction converts CO2 into a new molecule, methanol, which can be used as a fuel, an industrial solvent or a starting material for the manufacture of other chemicals.
  • Bocarsly likes to call the process "reverse combustion" because it is like running a burning reaction backwards. Instead of burning fuel and oxygen to produce CO2, the CO2 converts back into fuel and oxygen.
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  • Cole set up a flask containing a solution of CO2 and a pyridinium catalyst dissolved in water. In place of sunlight, which emits a broad spectrum of wavelengths of light, she shined on the flask a blue light-emitting diode (LED) because it gives off certain wavelengths that are highly efficient at driving the reaction. In the flask she placed an electrode that is activated by particles of light, or photons. "We used a semiconductor electrode that would allow us to substitute light for electricity," said Cole.
  • The Princeton scientists did some additional studies, and made a surprising discovery: They could turn CO2, which contains only one carbon, into a compound with a carbon-carbon bond, which vastly increases the possibilities for creating commercial applications.
Jac Londe

Making Oil from Plastic - 34 views

  • Making Oil from Plastic
  • Tons of plastic from Japan and US is left afloat in the Pacific Ocean, which is endangering marine life significantly.
  • Blest, a Japanese company has invented a safe and user friendly machine
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  • The machine is effective in recycling different kinds of plastic into oil.
  • Utilization doesn't just take into account the 20 percent of recycled plastic. But it also considers the incinerated 52 percent used for energy recovery like generating electric power or heat. Akinori Ito says "If we burn the plastic, we generate toxins and a large amount of CO2. If we convert it into oil, we prohibit CO2 production and at the same time, increase people's awareness about the value of plastic garbage"
  • Oil from Shale: Oil can be extracted from this fine grained, organic rich, sedimentary rock through pyrolysis, thermal dissolution or hyderogentation. Shale contains high concentrations of organic chemical compounds known as Kerogen. From this solid mixture, oil is extracted through chemical process. Shale can be effective converted into combustible oil shale gas and liquid hydrocarbons (shale oil). Global deposits of Shale are estimated to be around 2.8 trillion to 3.3 trillion barrels of restorable oil. Planet earth is blessed with about 600 known oil shale deposits, most of which is found in United States of America. Although several countries have oil hale deposits, known deposits of economic importance is found only in 33 countries.
BTerres

The Dicey Calculus of Contemporary Cooking - WSJ.com - 37 views

  • What's the difference between a 10-inch skillet and a 12-inch skillet?
  • Not just a mere two inches. The larger pan has 44% more surface area.
  • the rate of evaporation of a liquid is proportional to its exposed surface area, a sauce in a larger, flatter skillet will reduce far more rapidly than one in a taller, narrower pan
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  • A cook who doubles a recipe but keeps the same size pot and the same cooking time will wind up with a watery sauce.
  • try to stir-fry a batch of meat in a 10-inch skillet instead of a 12-inch skillet, and "instead of sautéeing you'll end up steaming it.
  • Think you can substitute an eight-inch cake pan for a nine-inch?
  • Don't—the nine-inch holds 27% more batter.
  • one teaspoon of table salt is equivalent to 1.5 teaspoons of Morton or two teaspoons of Diamond Crystal.
  • "I don't have table salt at home, because I made that mistake too often," Mr. Willoughby says.
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    Interesante artículo que relaciona matemáticas y cocina. Porcentajes, áreas, volúmenes...
anonymous

sorting solid, liquid, gas - 80 views

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    matter (K.5)
Martin Burrett

Fluid painter - 55 views

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    A lovely, easy way to make art with this fluid painter. Just disturb the layers to make them mix. Good for demonstrating convection currents in science. http://ictmagic.wikispaces.com/Art,+Craft+&+Design
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