Can a person turn gray in a minute? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Can a person turn gray in a minute? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

Can a person turn gray in a minute?

No. Hair roots can indeed lose pigment as a result of severe stress. But it will become noticeable only when the hair grows back.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

Why does the number of days in months differ?

The first people who adopted the year as a unit of time and divided it into approximately equal parts were the ancient Egyptians. They created a lunar (monthly) calendar, which was based on the appearance of a new moon every twenty-nine to thirty days. But this calendar was not entirely accurate.

The Romans also adopted a lunar calendar, and in order to harmonize it with the solar year, they had to add additional months as needed. In the end, Julius Caesar approved a calendar that takes the longitude of the solar year as 365 days. Some changes have been made to the units into which the year is divided - the months - to make the calendar more accurate. Here are the changes regarding the months made by Caesar and other Roman emperors.

January used to be the eleventh month and had twenty-nine days. Caesar made it the first month of the year and increased it to thirty-one days. In his calendar, February had twenty-nine days, and in leap years it had thirty. Emperor Augustus took one day from this month and added it to the month named August in his honor. The number of days in March has always been thirty-one.

April as a lunar month had twenty-nine days. Caesar added another day to it and got thirty.

May has always had thirty-one days, and that hasn't changed.

There were twenty-nine days in June, and Caesar made thirty.

The duration of July (this month was named after Julius Caesar) he set thirty-one days.

When August was a lunar month, it had twenty-nine days. Caesar increased it to thirty. Emperor Augustus, who named this month after himself, added to it another day, taken from February, to make it equal to July, named after Julius Caesar.

There were twenty-nine days in September when it was a month of the lunar year. Caesar increased it to thirty-one, but Augustus reduced it to thirty days.

October, which had thirty days in the Julian calendar, was extended by August to thirty-one days.

In November, according to the Julian calendar, there were thirty-one days, and Augustus reduced it to thirty.

Initially, there were twenty-nine days in December, Caesar made thirty, and then Augustus added another day, bringing the number to thirty-one. For a calendar to be useful, one must start from the premise that the total number of days in a year is three hundred and sixty-five. The number of days in months, as you can see, was arbitrarily set first by Julius Caesar and then by Augustus. We borrowed our calendar from the Romans.

Test your knowledge! Did you know...

▪ What does the dragon slain by Saint George represent in the coat of arms of Moscow?

▪ Is American food healthy?

▪ Who painted the black square a quarter of a century before Malevich?

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

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Logitech Webcam C930e 17.02.2013

Logitech has announced its new webcam Webcam C930e. The novelty is aimed at business users and has many interesting features, including a 90-degree viewing angle, support for H.264 SVC and UVC 1.5 codecs. The manufacturer calls the product "its most advanced business webcam".

The Webcam C930e model is equipped with a Carl Zeiss lens and allows you to shoot Full HD video. Provides remote control of digital 4x zoom (pan-tilt zoom). The mount allows you to rotate the camera to the desired angle. Also Webcam C930e is equipped with autofocus and supports RightLight 2 technology to visually enhance the image in poor lighting conditions.

The novelty is compatible with operating systems Windows 7, Windows 8, Mac OS X 10.7 and higher. Its release is scheduled for May this year, and the price will be $110.

Other interesting news:

▪ Aircraft model crossed the Atlantic

▪ Microcontroller Toshiba TMPM46BF10FG

▪ Espressif ESP32-WROVER WiFi Modules for IoT Voice Applications

▪ Looking for gravitons

▪ Live fast - live longer

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Videotechnique. Article selection

▪ article Basic principles and legal framework for the protection of the population from emergencies. Fundamentals of safe life

▪ article Does an ostrich really hide its head in the sand in case of danger? Detailed answer

▪ article Sumac juicy. Legends, cultivation, methods of application

▪ article Greenhouse irrigation management. Encyclopedia of radio electronics and electrical engineering

▪ article Voltage Converter. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews