Circus number. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Circus number. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Pour water into a mayonnaise jar (preferably only halfway). Take it with your right hand, but not in the usual way, but with your thumb turned downwards. Swing your arm around your shoulder quickly so that it describes a circle. Although the jar will be upside down for a moment, it will immediately return to its normal position. If you do this maneuver quickly and confidently, the water will not spill out. Of course, some training is needed here.

circus act

Perhaps it is more convenient to perform this number, especially at first, with a rectangular milk carton. After pouring water into it, place it in a string bag and rotate it in a vertical plane. It is easy to make sure that when using a soft connection (string bag), water will not pour out of a rotating vessel even at low rotation speeds. Not so in the case of a mayonnaise jar ... And in general it is easy to break it.

Author: Rabiza F.V.

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Microelectronic devices without semiconductors 10.11.2016

Scientists at the University of California San Diego (UCSD) have created the first microelectronic device that does not use a semiconductor material.

Under the influence of low voltage (up to 10 V) and radiation of a low-power infrared laser, the conductivity of the device increases by 1000%.

The secret of development is in the metamaterial, which was formed from gold on the surface of a silicon wafer, which plays the role of a passive substrate.

The researchers see parallels with vacuum tubes in their development, noting that the new technology will not completely replace semiconductor technology, but will overcome its inherent limitations in terms of operation at high frequencies and high powers.

The metamaterial created at UCSD has confirmed the viability of the idea. For practical applications, other similar metamaterials optimized for specific types of microelectronic devices can be created.

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