Thursday, January 28, 2010
This video shows a pumpkins cannon. It uses compressed air to accelerates the pumpkins through out a long pipe. As bigger the pipe, more time the pumpkin is accelerated, so higher is the inicial velocity. At a 45 degress angle the pumpkin reach the maximum horizontal distance.
Lets pump...pumpkins
This video shows a pumpkins cannon. It uses compressed air to accelerates the pumpkins through out a long pipe. As bigger the pipe, more time the pumpkin is accelerated, so higher is the inicial velocity. At a 45 degress angle the pumpkin reach the maximum horizontal distance.
Wednesday, January 27, 2010
Nitrocellulose, an explosive similar to nitroglicerin but, instead of glicerin, it has cellulosis on its composition. It is not sensitive to impact just to heat.
It burns so fast that there is no time to exchange heat with the hand
This tick uses the pascal principle to break up the bottom of a bottle! You'll need some practice to do that. Warning, the broken glass can be very dangerous!
This video shows how to make ferrofluid using household materials
Nitrocellulose - the gun cotton
Nitrocellulose, an explosive similar to nitroglicerin but, instead of glicerin, it has cellulosis on its composition. It is not sensitive to impact just to heat.
It burns so fast that there is no time to exchange heat with the hand
Pascal Principle bracks the bottle
This tick uses the pascal principle to break up the bottom of a bottle! You'll need some practice to do that. Warning, the broken glass can be very dangerous!
Make ferrofluid using household materials
This video shows how to make ferrofluid using household materials
Tuesday, January 26, 2010
This video shows how to play tennis using a soap bubbles and a carpet racket. The soap bubbles are formed by a doubled layer of soap at extremities and a layer of water at center.
The polar part of soap molecules are bonded to the water and the nonpolar part are on the outer side.
Carpet is composed of polyester, as the bubble's outer side, so the interaction between them is very weak and the bubble do not pop out.
How to Play tennis using soap bubbles and a carpet racket
This video shows how to play tennis using a soap bubbles and a carpet racket. The soap bubbles are formed by a doubled layer of soap at extremities and a layer of water at center.
The polar part of soap molecules are bonded to the water and the nonpolar part are on the outer side.
Carpet is composed of polyester, as the bubble's outer side, so the interaction between them is very weak and the bubble do not pop out.
Monday, January 25, 2010
Each chemical element has its own Identity given by the color emited when it is burning. The colors in fireworks is due a diferent kind of elements. Copper give the color green, sodium give the yellow one. This video shows a lot of diferent elements and its correspondent colors.
Glycerine or glicerol is oxidized by a very powerfull oxidant, the potassium permanganete. This reaction liberates a lot of heat, it's called exothermic reaction.
Learn about science and you make your own butter. Science has never tasted so good.
"Innovative technology often can make yesterday's science fiction into today's reality. This is particularly true with a prosthetic hand that brings to life fictional accounts of artificial, computer-driven replacement body parts. The bionic hand, called the I-Limb,was named one of the top 50 inventions this year by Time Magazine." From youtube description
Robots at third Austrian Hexapod Championships: Category Dance. The best of 2009!
Flame test as you never seen before
Each chemical element has its own Identity given by the color emited when it is burning. The colors in fireworks is due a diferent kind of elements. Copper give the color green, sodium give the yellow one. This video shows a lot of diferent elements and its correspondent colors.
Oxydation of glycerine by potassium permanganate
Glycerine or glicerol is oxidized by a very powerfull oxidant, the potassium permanganete. This reaction liberates a lot of heat, it's called exothermic reaction.
Science experiment - how to make butter
Learn about science and you make your own butter. Science has never tasted so good.
Bionic Hand is a Reality
"Innovative technology often can make yesterday's science fiction into today's reality. This is particularly true with a prosthetic hand that brings to life fictional accounts of artificial, computer-driven replacement body parts. The bionic hand, called the I-Limb,was named one of the top 50 inventions this year by Time Magazine." From youtube description
Best of Dance 2009 - Austrian Hexapod Championships
Robots at third Austrian Hexapod Championships: Category Dance. The best of 2009!
Sunday, January 24, 2010
This video elaborated by Prof Richard Wiseman from the University of Hertfordshire (UK) show the best science trick that you can do to in a party to entertain your friends.
That is very very dangerous.... be sure of what are you doing ....
"This is a piece of mercury thiocyanide. When decomposing, it makes large volume of ash, much larger than the piece of mercury thiocyanide itself.
By popular demand, here is a recipe to prepare mercury thiocyanide:
You need:
1. concentrated nitric acid (HNO3)
2. mercury (Hg) - from chemist or from thermometers
(alternative - buy mercury nitrate)
3. sodium or potassium thiocyanide (NaSCN or KSCN)
First, dissolve mercury in nitric acid to get mercury nitrate solution.
With concentrated nitric acid your mercury nitrate will probably crystallize - add
sufficient clean water to dissolve the crystals (say, 10 times the volume of nitric acid used).
(Alternatively: dissolve crystals of mercury nitrate in water)
In separate container, dissolve some sodium/potassium thiocyanide in water.
Add thiocyanide solution to mercury nitrate solution and mix it well.
Greyish suspension of insoluble mercury thiocyanide will form - wash with water a couple
of times (add water, mix, wait for mercury thiocyanide to separate at the bottom, decand/remove clear water, repeat.
Put paper coffee filter into funnel and filter out the mercury thiocyanide, dry iy - must be bone dry to use it.
Safety:
Nitric acid is dangerous, handle with safety glasses, wash your hands immediately if spilled.
Vapours of mercury are dangerous - best gandle on open air.
Sodium or potassium thiocyanide is not that dangerous but don't leave solution for anyone to drink!
When dissolving the mercury in nitric acid, vapours of nitrogen oxides will form - these are poisonous if inhaled.
While decomposing, mercury thiocyanide forms fumes - don't know what they contain but make sure you burn it in open air (and NOT in your bedroom! ;-) and stand against the wind to prevent the fumes from inhaling." From: youtube description video.
Top 10 science trick for parties
This video elaborated by Prof Richard Wiseman from the University of Hertfordshire (UK) show the best science trick that you can do to in a party to entertain your friends.
pharaoh's snake
That is very very dangerous.... be sure of what are you doing ....
"This is a piece of mercury thiocyanide. When decomposing, it makes large volume of ash, much larger than the piece of mercury thiocyanide itself.
By popular demand, here is a recipe to prepare mercury thiocyanide:
You need:
1. concentrated nitric acid (HNO3)
2. mercury (Hg) - from chemist or from thermometers
(alternative - buy mercury nitrate)
3. sodium or potassium thiocyanide (NaSCN or KSCN)
First, dissolve mercury in nitric acid to get mercury nitrate solution.
With concentrated nitric acid your mercury nitrate will probably crystallize - add
sufficient clean water to dissolve the crystals (say, 10 times the volume of nitric acid used).
(Alternatively: dissolve crystals of mercury nitrate in water)
In separate container, dissolve some sodium/potassium thiocyanide in water.
Add thiocyanide solution to mercury nitrate solution and mix it well.
Greyish suspension of insoluble mercury thiocyanide will form - wash with water a couple
of times (add water, mix, wait for mercury thiocyanide to separate at the bottom, decand/remove clear water, repeat.
Put paper coffee filter into funnel and filter out the mercury thiocyanide, dry iy - must be bone dry to use it.
Safety:
Nitric acid is dangerous, handle with safety glasses, wash your hands immediately if spilled.
Vapours of mercury are dangerous - best gandle on open air.
Sodium or potassium thiocyanide is not that dangerous but don't leave solution for anyone to drink!
When dissolving the mercury in nitric acid, vapours of nitrogen oxides will form - these are poisonous if inhaled.
While decomposing, mercury thiocyanide forms fumes - don't know what they contain but make sure you burn it in open air (and NOT in your bedroom! ;-) and stand against the wind to prevent the fumes from inhaling." From: youtube description video.
Saturday, January 23, 2010
Friday, January 22, 2010
The eggshell has calcium carbonate in its composition. Acids as vinegar (acetic acid) reacts with calcium carbonate generating calcium acetate and carbon dioxide. After all calcium carbonate be consumed will remain just the proteins of the eggshell making a elastic shell.
Eggshel and vinegar - reaction to make a rubber egg
The eggshell has calcium carbonate in its composition. Acids as vinegar (acetic acid) reacts with calcium carbonate generating calcium acetate and carbon dioxide. After all calcium carbonate be consumed will remain just the proteins of the eggshell making a elastic shell.
Thursday, January 21, 2010
"Cueva de los Cristales (Cave of the Crystals) is a cave connected to the Naica Mine 300 metres (980 ft) deep in Chihuahua, Mexico. The main chamber contains giant selenite crystals, some of the largest natural crystals ever found.[1] The cave's largest crystal found to date is 11 m (36 ft) in length, 4 m (13 ft) in diameter and 55 tons in weight. The cave is about 27 m (89 ft) in length and 9 m (30 ft) in width. The cave is extremely hot with air temperatures reaching up to 44 °C (111 °F) with 90 to 100 percent humidity. The cave is relatively unexplored due to the extreme temperatures and high humidity.[2] Without proper protection people can only endure approximately ten minutes of exposure at a time.[3]" From wikipédia: http://en.wikipedia.org/wiki/Cave_of_the_Crystals
Naica mine Chihuahua, Mexico
"Cueva de los Cristales (Cave of the Crystals) is a cave connected to the Naica Mine 300 metres (980 ft) deep in Chihuahua, Mexico. The main chamber contains giant selenite crystals, some of the largest natural crystals ever found.[1] The cave's largest crystal found to date is 11 m (36 ft) in length, 4 m (13 ft) in diameter and 55 tons in weight. The cave is about 27 m (89 ft) in length and 9 m (30 ft) in width. The cave is extremely hot with air temperatures reaching up to 44 °C (111 °F) with 90 to 100 percent humidity. The cave is relatively unexplored due to the extreme temperatures and high humidity.[2] Without proper protection people can only endure approximately ten minutes of exposure at a time.[3]" From wikipédia: http://en.wikipedia.org/wiki/Cave_of_the_Crystals
Wednesday, January 20, 2010
"Explanation: What would it look like to travel across the known universe? To help humanity visualize this, the American Museum of Natural History has produced a modern movie featuring many visual highlights of such a trip. The video starts in Earth's Himalayan Mountains and then dramatically zooms out, showing the orbits of Earth's satellites, the Sun, the Solar System, the extent of humanities first radio signals, the Milky Way Galaxy, galaxies nearby, distant galaxies, and quasars. As the distant surface of the microwave background is finally reached, radiation is depicted that was emitted billions of light years away and less than one million years after the Big Bang. Frequently using the Digital Universe Atlas, every object in the video has been rendered to scale given the best scientific research in 2009, when the video was produced. The film has similarities to the famous Powers of Ten video that has been a favorite of many space enthusiasts for a generation." From: http://apod.nasa.gov/apod/ap100120.html
Real scale universe animation
Tuesday, January 19, 2010
This video shows how to make hot ice, a supper saturated solution of sodium acittate that crystallizes when you disturb it or add a small crystal.
The water inside the ivory soap expands when heated in microwave oven creating a very interesting shape.
Universal indicator is used to find out the approximated PH of some substance. This video shows at first a ph 14. As some acid is added the color starts to changes. In the end the beakers bottom have a different ph from the top, so the various colors appears.
Sodium Acittate hot ice
This video shows how to make hot ice, a supper saturated solution of sodium acittate that crystallizes when you disturb it or add a small crystal.
Science Experiment - Microwave Ivory Soap
The water inside the ivory soap expands when heated in microwave oven creating a very interesting shape.
Rainbow juice using a Universal indicator
Universal indicator is used to find out the approximated PH of some substance. This video shows at first a ph 14. As some acid is added the color starts to changes. In the end the beakers bottom have a different ph from the top, so the various colors appears.
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