Experiments made by Jiří´s brother
Find more videos like this on Have fun with simple experiments
Saturday, February 20, 2010
How to make refractory paper?
Home made video from Justyna&Grzegorz
To our experiment we need:
metal cup, piece of paper and lighter.
Heat is transfered from paper belt to metal cup. That's why paper can not reach ignition temperature.
To our experiment we need:
metal cup, piece of paper and lighter.
Heat is transfered from paper belt to metal cup. That's why paper can not reach ignition temperature.
Tuesday, February 16, 2010
Combustion of a candle (Combustión de una vela)
Materials:
A soup bowl
A candle
A narrow glass
We fill the plate with water
We light the candle and put into the plate so that the glass doesn´t touch the flame
We place a glass on the candle. We wait for a moment and we see that the flame goes out, and them comes into the water in the glass.
When we light the candle, it produces a combustion reaction: the wax of the candle reacts with the oxygen of the air and produces carbon dioxide and water steam. We can see that inside of the glass appear a few drops of water. It is the water steam produced in the combustion of a candle that is condensed in the walls of the containers.
In the reaction the gas is consumed, the oxygen that forms a part of the air, but other two are formed, the carbon dioxide and the water steam. The volume of the gas produced, is smaller than the volume of the oxygen that is consumed.
The results is that in the interior of the glass the pressure is reduced and because of that the water goes up until the interior pressure is reduced and because of that the water goes up until the interior pressure is equal to the interior one
A soup bowl
A candle
A narrow glass
We fill the plate with water
We light the candle and put into the plate so that the glass doesn´t touch the flame
We place a glass on the candle. We wait for a moment and we see that the flame goes out, and them comes into the water in the glass.
When we light the candle, it produces a combustion reaction: the wax of the candle reacts with the oxygen of the air and produces carbon dioxide and water steam. We can see that inside of the glass appear a few drops of water. It is the water steam produced in the combustion of a candle that is condensed in the walls of the containers.
In the reaction the gas is consumed, the oxygen that forms a part of the air, but other two are formed, the carbon dioxide and the water steam. The volume of the gas produced, is smaller than the volume of the oxygen that is consumed.
The results is that in the interior of the glass the pressure is reduced and because of that the water goes up until the interior pressure is reduced and because of that the water goes up until the interior pressure is equal to the interior one
by Amelia and Laura
Sunday, February 14, 2010
Vinegar&baking soda
Experiment from Kinga & Żaneta
We pour vinegar into a bottle and fill the balloon with baking soda. Then we're stretching a balloon on the bottle and turn it up side down. The balloon grows up by itself. In this experiment carbon dioxide is created.
Next we let it into the bottle. The burning match will dejeckt in this bottle, because there isn't any oxygen.
So when we remove the carbon dioxide from the bottle, the match will burn because there is oxygen inside now.
We pour vinegar into a bottle and fill the balloon with baking soda. Then we're stretching a balloon on the bottle and turn it up side down. The balloon grows up by itself. In this experiment carbon dioxide is created.
Next we let it into the bottle. The burning match will dejeckt in this bottle, because there isn't any oxygen.
So when we remove the carbon dioxide from the bottle, the match will burn because there is oxygen inside now.
Saturday, February 13, 2010
Flying cork
Experiment from Ania&Adriej
To ours experiment we need a water, a stand, a cork, a test tube and a burner. We pour water into the tube and dose it with a cork. Then we put this on a stand and burner under it. We heat the water. The cork fires out because steam in tube pushes the cork under high pressure.
To ours experiment we need a water, a stand, a cork, a test tube and a burner. We pour water into the tube and dose it with a cork. Then we put this on a stand and burner under it. We heat the water. The cork fires out because steam in tube pushes the cork under high pressure.
Potential Energy - Powered Car
Our car is powered by potential energy of a weight. Pull up the weight by rotating back wheels. Potential energy of the weight goes up. Release the weight, potential energy of the weight transforms into kinetic energy of the car. The car moves.
Soap-Powered Boat
1.Cut a boat out of the index card.
2.Cut a small slot in the rear of the boat for the engine. That's where the fuel (the dishwashing soap) will go.
3.Float the boat in the container of water.
4.Pour a few drops of dishwashing soap in the engine and watch it go.
Why did the boat move? The attraction between water particles at the water's surface produces surface tension. This gives the surface a skin-like quality. Think of this thin skin-like quality like a balloon. Adding liquid soap is like popping the balloon. You break the surface tension; the thin "skin" breaks and pulls away to the sides. If there's something floating on these water particles, like the boat, it goes along for the ride. After the whole "skin" breaks the boat sinks.
2.Cut a small slot in the rear of the boat for the engine. That's where the fuel (the dishwashing soap) will go.
3.Float the boat in the container of water.
4.Pour a few drops of dishwashing soap in the engine and watch it go.
Why did the boat move? The attraction between water particles at the water's surface produces surface tension. This gives the surface a skin-like quality. Think of this thin skin-like quality like a balloon. Adding liquid soap is like popping the balloon. You break the surface tension; the thin "skin" breaks and pulls away to the sides. If there's something floating on these water particles, like the boat, it goes along for the ride. After the whole "skin" breaks the boat sinks.
Subscribe to:
Posts (Atom)