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How many stars and stripes are on the US flag and why? Detailed answer

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How many stars and stripes are on the US flag and why?

On July 14, 1777, the second Continental Congress in Philadelphia passed a resolution according to which the US national flag was to have 13 stripes, alternately red and white, and 13 white stars on a blue field, which personify a new constellation - the union of 13 former English colonies united in struggle for independence from Britain. The number of stripes (7 red and 6 white) has remained unchanged since then, and the number of stars has increased with the increase in the number of states in the United States.

The modern American flag with 50 stars was first raised in July 1960 in connection with the new state of Hawaii. A year earlier, the 49th star appeared on the flag when Alaska became a state.

Before that, the last time the number of stars changed was in 1912, when New Mexico and Arizona became states.

Author: Kondrashov A.P.

 Random interesting fact from the Great Encyclopedia:

In how many Soviet films did the bronze statue of Pegasus, which he examined in the Gorbunkov store, play?

Gorbunkov from the "Diamond Hand" inspects the same bronze statue of Pegasus in the commission shop that Novoseltsev from "Office Romance" carries in the elevator. The same bronze horse flashed in the films "Seventeen Moments of Spring", "Shirley Myrli", "My Sweet and Gentle Beast", "Secret Mission", "Package". Another example of inter-film film props is a female sculpture, with which the landowner Alexei falls in love from the "Formula of Love". It can also be seen in the films "Eternal Labyrinth", "Vassa", "Old New Year" and, again, "Office Romance".

 Test your knowledge! Did you know...

▪ Which American politician has held both of the highest government offices (Vice President and President of the United States) without being elected to either of them?

▪ What substance is the most common in the world?

▪ What do the copper pipes that you need to pass after the fire and water symbolize?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

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Cells increase in volume when tissues are bent 14.05.2022

Scientists at the University of Geneva (UNIGE) have found that when tissue bends, the volume of its constituent cells increases rather than decreases. This discovery opens up new possibilities for growing organs in vitro. They will allow to some extent to reduce the number of experiments on animals.

Morphogenesis is responsible for how cells are distributed in space to give shape and structure to our organs. This process is triggered during embryonic development and explains how, for example, the folds of our intestines or the alveoli of our lungs are formed. In other words, its mechanisms underlie our development and the development of all living beings.

In the new study, the UNIGE team looked at how the cells that make up tissue react and adapt when the tissue is flexed. By folding up a cell monolayer in vitro, which is a compact, flat "sheet" of cells stacked next to each other, scientists made a paradoxical discovery. They found that the volume of cells located at the fold increased by about 50% after five minutes instead of decreasing, and returned to normal within 30 minutes. This is the opposite of what can be observed when an elastic material is bent.

By bending a "sheet" of cells similar to the one that makes up our skin, the researchers noticed that the cells swell, taking the form of small domes. Cell volume increases due to a combination of two phenomena: mechanical and biological. Cells develop in an environment consisting of salt water. The semi-permeable membrane separating them from the environment allows water to pass through, but not salt, which exerts a certain pressure on the cell. The greater the concentration of salt outside - and therefore the higher the so-called osmotic pressure - the more water will pass through the cell membrane, increasing its volume. When the tissue bends, the cells react as if the osmotic pressure is increased. Therefore, they absorb more water - and swell.

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