Simple Science - Digest of Updated Experiments # 27
A year and a half has passed since the channel EASY SCIENCE began to work. Behind more than 200 experiences. We decided to celebrate this event by releasing a small video:
Now we present our experiences in an updated form. We tried to make them even more spectacular and informative. And not without pride, we present four videos of the new format to the audience:
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The foil consists mainly of aluminum, steel and tin. And therefore is an excellent conductor of electric current. Having closed a piece of foil on the battery terminals, we get a simple electrical circuit, which, thanks to our scissors, consists of three series-connected parts.
The current passes through the foil and heats it like a spiral in an electric stove or a light bulb, but unevenly, because the thinner the conductor, the more resistance it has, the more energy is released. A thin (about 2 mm) piece of foil on the jumper heats up more than the rest and heats up. The paper glued to the foil from the heat ignites, and from it - a piece of cotton wool, which, in turn, ignites the candle. It's simple.
For the experience you will need: a new AA battery or the like, packing gum plates, cotton wool, a candle.
Vegetable oil does not mix with water and is placed on top of the water. You can experimentally pick up a solid (for example, a float) so that it will be on the border of these liquids.
If the bottle is half filled with tinted water and the rest is filled with oil, there will be no air left in the bottle. The viewer will have the impression that the bottle has a blue ocean. And if you shake the bottle, you get a real storm.
For the experience you will need: a plastic bottle, water, paint or food coloring, vegetable oil, a float.
Cavitation from Latin is translated as "emptiness". Cavitation occurs as a result of a local decrease in pressure in a fluid, for example, as its velocity increases. At this moment, cavities are formed in the fluid, which are called cavitation bubbles.
At the time of impact at the bottom of the bottle pressure drops sharply. Moving with the flow to a region with a higher pressure, cavitation bubbles collapse, emitting a shock wave. The resulting shock wave causes the destruction of the glass.
For the experience will need: a glass bottle, water, basin.
The burning of gasoline is a complex physico-chemical process. However, in our experience, everything is really simple! It is gasoline vapors that burn (gasoline has a low boiling point of 33 ° C to 205 ° C). Heated couples tend up (remember how steam escapes from the spout of the kettle) and burn there. It turns out that burning occurs only at the upper part of the ball (no matter how cool it is - the pairs will fly up, flowing around the ball and burning). Until most of the gasoline burns out, it’s pretty easy and almost safe to keep the balls below.
Important note : the fabric must be used necessarily from 100% cotton.
For the experience will need: fabric 100% cotton, thread, gasoline, matches or a lighter.
On August 8, the Boomstarter website launched a fundraising for publishing a book for children EASY SCIENCE. To print 5000 copies of the book required 380.000r. And all this money was collected within 10 days. In many respects - thanks to habraeffektu, which worked after our first publication about the book.
Since we were already working on the second book, we were offered to continue the project on a boomstarter. To date, 625 people have already supported us (many thanks to you guys!) And 576.375p have been collected. More information about the book can be found here . There is also a pre-order for the book.
If you have not yet supported our project and are ready to do it right now - you can transfer money on the project page . It also describes in detail all the rewards that sponsors receive. Any amount will be useful for the case: from 50 rubles. to ... (no upper limit;)
Now we present our experiences in an updated form. We tried to make them even more spectacular and informative. And not without pride, we present four videos of the new format to the audience:
- useful experience;
- beautiful experience;
- unhelpful experience;
- an experience that should not be repeated.
')
Fire from batteries and chewing gum
The foil consists mainly of aluminum, steel and tin. And therefore is an excellent conductor of electric current. Having closed a piece of foil on the battery terminals, we get a simple electrical circuit, which, thanks to our scissors, consists of three series-connected parts.
The current passes through the foil and heats it like a spiral in an electric stove or a light bulb, but unevenly, because the thinner the conductor, the more resistance it has, the more energy is released. A thin (about 2 mm) piece of foil on the jumper heats up more than the rest and heats up. The paper glued to the foil from the heat ignites, and from it - a piece of cotton wool, which, in turn, ignites the candle. It's simple.
For the experience you will need: a new AA battery or the like, packing gum plates, cotton wool, a candle.
Ocean in a bottle
Vegetable oil does not mix with water and is placed on top of the water. You can experimentally pick up a solid (for example, a float) so that it will be on the border of these liquids.
If the bottle is half filled with tinted water and the rest is filled with oil, there will be no air left in the bottle. The viewer will have the impression that the bottle has a blue ocean. And if you shake the bottle, you get a real storm.
For the experience you will need: a plastic bottle, water, paint or food coloring, vegetable oil, a float.
Knock the bottom of the bottle
Cavitation from Latin is translated as "emptiness". Cavitation occurs as a result of a local decrease in pressure in a fluid, for example, as its velocity increases. At this moment, cavities are formed in the fluid, which are called cavitation bubbles.
At the time of impact at the bottom of the bottle pressure drops sharply. Moving with the flow to a region with a higher pressure, cavitation bubbles collapse, emitting a shock wave. The resulting shock wave causes the destruction of the glass.
For the experience will need: a glass bottle, water, basin.
Fireballs
The burning of gasoline is a complex physico-chemical process. However, in our experience, everything is really simple! It is gasoline vapors that burn (gasoline has a low boiling point of 33 ° C to 205 ° C). Heated couples tend up (remember how steam escapes from the spout of the kettle) and burn there. It turns out that burning occurs only at the upper part of the ball (no matter how cool it is - the pairs will fly up, flowing around the ball and burning). Until most of the gasoline burns out, it’s pretty easy and almost safe to keep the balls below.
Important note : the fabric must be used necessarily from 100% cotton.
For the experience will need: fabric 100% cotton, thread, gasoline, matches or a lighter.
And in conclusion, I would like to tell you once again about our project with a children's book on a bumstarter.
On August 8, the Boomstarter website launched a fundraising for publishing a book for children EASY SCIENCE. To print 5000 copies of the book required 380.000r. And all this money was collected within 10 days. In many respects - thanks to habraeffektu, which worked after our first publication about the book.
Since we were already working on the second book, we were offered to continue the project on a boomstarter. To date, 625 people have already supported us (many thanks to you guys!) And 576.375p have been collected. More information about the book can be found here . There is also a pre-order for the book.
If you have not yet supported our project and are ready to do it right now - you can transfer money on the project page . It also describes in detail all the rewards that sponsors receive. Any amount will be useful for the case: from 50 rubles. to ... (no upper limit;)
Source: https://habr.com/ru/post/192350/
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