The glass is a diving bell. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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The glass is a diving bell. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

"Diving bell" is a large metal cap, which is lowered with the open side to the bottom of the reservoir for the performance of any work.

After lowering it into the water, the air contained in the cap is compressed and does not let water into this device. Only at the very bottom remains a little water. In such a bell, people can move and perform the work entrusted to them. Large chambers, for more complex work, are called caissons.

The breathing air for the occupants is supplied under high pressure to prevent water from entering the working space. People gradually get used to the increased pressure when entering the caisson, and when leaving, they also gradually get used to normal atmospheric pressure.

Glass - diving bell

Take a glass and a plate. Pour water into a plate and place a glass turned upside down in it. The air in the glass will compress, and the bottom of the plate under the glass will be filled with very little water. Before you put a glass in a plate, put a cork on the water. It will show how little water is left at the bottom.

Author: Rabiza F.V.

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Scientists position the device as a personal device that measures the deviation of blood pressure from the norm, pulse, and fixes the presence or absence of arrhythmia. When the device detects a critical situation, it sends messages to relatives and doctors using the built-in GSM modem.

It is reported that scientists are positioning the device as a personal device that measures the deviation of blood pressure from the norm, pulse, fixes the presence or absence of arrhythmia. When the device detects a critical situation, it sends messages to relatives and doctors using the built-in GSM modem.

"We want to create a device for continuous use, for example, in the form of a watch, a bracelet. This will allow us to "monitor" the state without any additional human actions for 24 hours a day," said the head of the development team, university teacher Dmitry Medvedev.

According to him, the advantage of the shape of the watch is that it is close to the radial artery, so in the lower part of the case you can place sensors that allow you to measure pressure and pulse, as well as an acceleration sensor - an accelerometer that allows you to "filter" motor activity, which gives an error in measurements. An information display will be located on the front side of the device.

According to Medvedev, the method of measuring the speed of propagation of a pulse wave, used in the development, needs to be improved. "We have to solve a number of problems, for example, to separate the useful signal when taking an electrocardiogram from the accompanying noise, because the signal-to-noise ratio during the measurement is very low," he said.

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