Physics and chemistry experiments are always exciting and unexpected. That is why in some lessons at school it was not that boring, but very interesting and fun. The Novate.ru editorial board offers to recall several entertaining scientific secrets that make it possible to conduct quite entertaining experiments. Their result is able to improve the mood not only for children, but also for adults, as well as with some imagination. even become a part of a holiday or an educational weekend, as well as benefit in unforeseen situations.
1. Home engine
First you need to take a small piece of wire and strip it from both sides. You will also need two neodymium magnets that are applied to each other. On top of them, with the head down, you need to put a screw, you should try to ensure that it is located exactly in the center of the magnets. A battery is placed on its sharp part, and with the help of a wire, the circuit is closed: one part of it is applied to the magnets, and the second to the upper edge of the battery. Now you can lift the entire structure and see how the screw turns along with the magnets. Moreover, they develop a rather impressive speed: about 45 revolutions per second.
There is strong friction at the point of contact between the magnets and the wire and sparks may appear, and the screw becomes very hot, therefore, extreme caution should be exercised not to bring the structure close to eyes or flammable subjects. With extreme care, you also need to stop the movement of the screw, as it develops high speed and can rebound.
2. Is there no fire?
For the experiment, it is necessary to take a thin wire and remove the insulation from both sides for a length of about 1.5 cm. After that, the exposed wire should be cleaned. This step must be mandatory, otherwise the life hack may not work. After that, from one end of the wire, you need to select one thin wire, and cut the rest with wire cutters. The end of the wire that remains intact must be fixed to the battery with insulating tape. A single stripped contact should be leaned against the positive terminal of the battery. After that, we take a match and apply it to the junction of the wire and battery. The result will be the instant appearance of fire.
This rather simple life hack can help out on a hike, during outdoor recreation or at home, when a box of matches is lost somewhere and there is no way to light a match in the usual way. If you can't strike a match the first time, you can wind a single wire directly onto its head to improve contact. To avoid injuries and burns, remember that you cannot hold onto the wire at the time of the experiment, because it gets very hot.
3. Magic movement
First you need to take a sufficient amount of copper wire and form a rectangle out of it. To do this, you need to use many separate pieces of wire, the ends of which will be wrapped and found on top of each other. Inside the rectangle, you need to create a ledge of about 1 cm. By location, it should be opposite the double wire section. The free ends of the wire should form a diamond-like shape. A neodymium magnet must be attached to the battery.
After that, an ordinary battery is placed on the table, and a rectangle is placed on top of it, touching with its protrusion the contact of the positive pole. The two free edges of the wire should touch the magnet. Fulfillment of all these conditions will lead to an interesting result: the wire will begin to move quickly enough and circle around the battery.
Interesting information: You can give the wire any shape, not necessarily a rectangle. An interesting effect is also obtained if you make a heart or a spiral. The idea can be used for an unusual decoration of a children's party.
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4. Quick fire without matches
Even if there were no matches at hand during the campaign, it doesn't matter, the fire can be made without them. However, you will need a battery and a piece of foil, preferably paper-covered on one side. The battery can be found in the player or flashlight, and the foil can be found from chewing gum, chocolate or bar. After that, using scissors or just your hands, you need to form a narrow strip of paper from the foil, which will become thinner in the middle and have a thickness of no more than 2 mm. A battery and foil are brought to dry grass, small twigs and paper. The two edges of the foil lean against different poles of the battery, as a result of which it heats up and quickly ignites in the place of thinning, transmitting the fire to the future fire.
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5. Races using scrap materials
For this experiment, you will need several meters of food foil, two finger batteries, and several neodymium magnets. First of all, you should unfold and spread the foil on a flat surface. Then, a pair of neodymium magnets must be attached to each of the two ends of the battery. After that, placing the battery horizontally, you can put it on the foil. If no reaction follows, you need to turn the neodymium magnets on the other side on one side of the battery and repeat your actions. The battery should travel on the foil, as if it were a refueling machine on wheels. Such unusual races can be arranged with children, along the way, acquainting them with the laws of physics. If the battery is turned over, it will go the other way.
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A source: https://novate.ru/blogs/170820/55691/