Three piece squares. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Three piece squares. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Is there a way to cut a square into three pieces that can be re-arranged to make a square with a hole inside? The answer will be positive. One elegant solution is based on the applicationparadox.

Instead of placing the pictures in a special way in ledges, and making the cut straight (horizontally), the pictures are placed on one straight line, and the cut is made in ledges. The result is amazing: not only does the picture disappear, but a hole appears at the place of its disappearance.

Author: M.Gardner

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Random news from the Archive

Honeywell NSC Series Differential Sensors 19.10.2021

Honeywell introduced the new NSC series differential pressure transmitters: NSCSAAN600LDUNV for 600 Pa differential pressure measurement and NSCSAAN016KDUNV for 15 kPa differential pressure measurement.

Differential versions allow pressure measurement between two pressure ports. These sensors are designed for use with non-corrosive and non-ionic gases such as air. Port 1 can also be used for non-corrosive, non-ionic liquids on sensors rated above 6 kPa. The NSC series has a variety of mounting options, making it easy for device manufacturers to integrate the product into their applications. These sensors have industry-leading accuracy, and frequency response is typically only limited by the end user's system. All products are designed and manufactured in accordance with ISO 9001.

NSC series sensors can be applied in medical and industrial equipment such as nebulizers, spirometers, hospital beds, oxygen concentrators, valves, pumps and actuators.

The sensor supply voltage can be in the range of 1,5...12 V for NSCSAAN016KDUNV and 2,7...6,5 V for NSCSAAN600LDUNV. The maximum current when powered by 5 V does not exceed 2,2 mA.

Features of NSC series pressure transmitters:

lack of compensation and amplification;
industry-leading accuracy to +-0,15% FSS BFSL;
the flexibility to perform your own calibration while maintaining the industry-leading stability, accuracy, and repeatability of Honeywell TruStability pressure transmitters;
operating temperature range -40...85°C;
measurement of absolute, differential or gauge pressure.

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