Monday, January 25, 2010
Robots at third Austrian Hexapod Championships: Category Dance. The best of 2009!
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
Subscribe to:
Posts (Atom)
Postagens populares
-
"Explanation: What would it look like to travel across the known universe? To help humanity visualize this, the American Museum of Nat...
-
Here we have another example of science experiments that uses surface tension to works. Spread peppers in a plate full of water as the...
-
What this video shows seems a magic trick but is pure science! Baking soda (sodium bicarbonate) when is mixed up with vinegar (acetic acid...
-
Physics demonstration of Pascal principle using plastic bottles
-
Privacy Policy for http://sciencevideosblog.blogspot.com/ The privacy of our visitors to http://sciencevideosblog.blogspot.com is importan...
-
How does a lightning form? And how does it behave? These two questions are hard to answer because the lightning happens so fast that we ...
-
Learn more about Infra Red Vision and how does it influence our life.
-
The concentrated sulfuric acid can take the water out of the sugar molecule producing coal plus water according to reaction equation: C1...
-
Using a simple tea bag is possible make a little hot air balloon, see the video instructions. The fire heat the air inside the balloon, h...
-
This video shows how to do it and how it is possible
