What is barter? Detailed answer

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What is barter? Detailed answer

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What is barter?

Barter is a natural exchange of goods, without monetary payment.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

Why aren't all clouds rainy?

Have you ever flown a plane through the clouds, or maybe climbed high up a mountain and watched the clouds swirl around you? Then you should have a good idea of what a cloud is: just a collection of fog.

As you know, air always contains water vapor. In summer, there is more vapor in the air because the temperature is higher. When there is a lot of vapor in the air, a slight decrease in temperature is enough for it to begin to condense (that is, water droplets form). In this case, we say that the air is saturated. Just a slight decrease in temperature is enough for water vapor in saturated air to condense. So when saturated warm air rises to an altitude where the temperature is lower, condensation occurs and clouds form. Water molecules combine to form countless little droplets.

What happens when all those water droplets in a cloud meet a mass of warm air? They evaporate - and the cloud disappears! Therefore, clouds are constantly changing their shape. The water contained in them constantly turns into water, then into steam. The water droplets contained in the cloud have weight, so gravity pulls them down and they sink lower and lower. When most of them fall, they reach the warmer air layers, and this warm air causes them to evaporate. Therefore, clouds are obtained from which it does not rain. They evaporate, and the droplets do not have time to reach the earth's surface.

But if we assume that the air under the cloud is not warmer? What is very damp air? Then the droplets will increase and increase in size, and the condensation will be stronger and stronger. Pretty soon all the little droplets will turn into big drops reaching the ground and it will rain!

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Random news from the Archive

Eye-Fi Mobi cards for wireless image transfer 06.06.2013

The range of Eye-Fi, which produces SD memory cards combined with wireless adapters, has been replenished with two models of the new Eye-Fi Mobi series.

According to the manufacturer, Eye-Fi Mobi is the first memory card specifically designed to link a camera and a mobile device. Pictures taken by the camera in which such a card is installed are instantly visible on a tablet or smartphone with iOS or Android connected via a wireless channel.

Mobi claims to eliminate the hassle of transferring footage, allowing the photographer to focus on the shoot. Pictures transferred to a mobile device can be viewed, edited, shared on social networks and sent by mail as if they were taken with the built-in camera of a smartphone or tablet. There is no need to put up with the limitations of the built-in camera.

Among the advantages of Eye-Fi Mobi, the manufacturer notes the ease of installation and use. It does not require a computer or other equipment to operate. It is enough to install the appropriate application on your mobile device and enter the 10-digit card ID. One and the same card can be linked to several mobile devices. Although Wi-Fi is used for communication, no router or access point is needed.

The novelty is offered in two versions of volume: 8 and 16 GB. The cards cost $50 and $80 respectively. Both are labeled Class 10.

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