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Square on the calendar. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

The magician stands with his back to the audience, and one of them circles a square containing 9 numbers on a calendar in any month. Then the viewer calls the smallest of these numbers. The magician immediately, after a quick count, announced the sum of these nine numbers.

Focus secret:

It is necessary to add 8 to the named number and multiply the result by 9

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Latest news of science and technology, new electronics:

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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. ... >>

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Random news from the Archive

dragonfly robot 26.08.2008

Dutch engineers have created a flying robot weighing three grams.

The new dragonfly robot named "DelFly Micro", weighing three grams and with a wingspan of ten centimeters, continues the series of flying robots being developed at the Delft Institute of Technology. Its predecessors - "DelFly I" and "DelFly II" - were larger: 23 g and 50 cm, as well as 16 g and 30 cm, respectively. The new robot is capable, obeying the operator's signal, to flutter like a dragonfly and transmit a video image using a miniature camera. And the batteries are enough for him for three minutes of flight at a speed of 5 m / s.

For the sake of weight reduction, something had to be sacrificed: "DelFly II" could not only fly horizontally, but hover over a certain point and move backwards. The new robot does not yet know how, but it is able to get into the most secluded place and show the researchers what is there. After some time, it will be equipped with a pattern recognition system, and it will be able to fly completely independently.

This robot was an important step towards the goal set by the Dutch roboticists: to make an artificial dragonfly weighing one gram and with a wingspan of 5 cm.

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