Compass made from a needle and a glass of water. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Compass made from a needle and a glass of water. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Insert a thin needle between the poles of the horseshoe magnet. The needle will stand upright. Magnetic lines of force pass through the needle and it becomes magnetized.

Compass from a needle and a glass of water

Put the needle on the water in a way previously described, pre-lubricated with grease.

Compass from a needle and a glass of water

The needle will be supported by a surface film of water, will not sink and will take a strictly defined position: north - south.

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Wi-Fi will double in speed 13.06.2015

Scientists from the University of Bristol (UK) have developed a technology that allows a radio transmitter to carry out two-way data transmission on the same frequency.

Reception and transmission of data within the same frequency became possible due to the artificial maintenance of electrical balance at the connecting points of antennas located on the same chip. This provides a reduction in the level of interference from the receiving and transmitting circuits.

According to the British, with this method, interference is suppressed so effectively that the same frequency range can be used for full-fledged two-way data transmission without loss of communication quality.

Thus, the use of full-duplex two-way communication technology will approximately double the Wi-Fi throughput, reduce the load on the frequencies used by providers, and relieve subscribers from restrictions associated with frequency ranges.

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