Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


EFFECTIVE FOCUSES AND THEIR CLUES
Free library / Directory / Spectacular tricks and their clues

Mysterious upheavals. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Comments on the article Comments on the article

Focus Description:

For focus, you need two paper sheets: on one side - red, on the other - white.

The sheets are folded in half: one vertically and the other horizontally. Fold them with one (for example, white) side out. Insert the horizontal sheet into the vertical one and then turn both sheets in the opposite direction so that the horizontal one is outside. From it, a vertical leaf is half visible. Now they are both red.

Without pulling out the vertical sheet, slide it from one end to the other. He turned himself out - from red to white.

Focus secret:

A sheet of paper that is folded vertically has a horizontal slit in the center, as shown in the figure.

Focus Mysterious coups

Inserting a sheet folded horizontally into a sheet folded vertically, pass half of it through the slit outward. If now turn both sheets the other way around, then in a horizontally folded sheet, the halves of the vertical one will look in different directions. Therefore, the leaf changes color if you push its other half.

 We recommend interesting articles Section Spectacular tricks and their clues:

▪ Phonograph record against gravity

▪ Strange screen

▪ Fifteen matches are lifted in one

See other articles Section Spectacular tricks and their clues.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Microprocessors based on ternary code for the Internet of things 24.11.2016

Scientists from South Korea's Sungkyunkwan University have developed a technology for semiconductors that operate in the ternary number system - a positional number system with an integer base of three. It is more capacious than the binary system in which modern computing devices operate today.

Another feature of the development, according to team leader Park Jin-Hong (Park Jin-hong), was the use of "negative differential resistance." This is a property of individual elements or nodes of electrical circuits, manifested in the appearance on the current-voltage characteristic of a section where the voltage decreases with increasing current.

In their work, South Korean scientists used an allotropic modification of phosphorus (phosphorene) and rhenium disulfide (ReS2). Unlike binary-based semiconductors, their development is more energy efficient, requires much less power, and will run faster, the scientists say.

This will eventually lead to the development of new energy-saving schemes that will be used in IoT devices and other industries associated with the processing of large amounts of data. Recall that, according to Gartner analysts, the number of IoT points worldwide will reach 2020 billion by 21. According to the Genpact Research Institute, $2030 trillion will be invested in the industrial Internet of Things by 60. These figures encourage developers to actively develop new technologies for this industry.

Other interesting news:

▪ Mercedes will make trucks more economical

▪ The lower the population density, the happier people are

▪ Treatment of infections with electric current

▪ Electronics will evaluate the level of sweetness of food and drinks

▪ Fault determined by sight

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Electric motors. Article selection

▪ article Whatever happens. Popular expression

▪ article When did the first attempt to launch a jet aircraft with a person on board take place? Detailed answer

▪ Sorghum article. Legends, cultivation, methods of application

▪ article Improving the parametric voltage regulator. Encyclopedia of radio electronics and electrical engineering

▪ article Simple power supply on BP2857D for LED lamps. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024