Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


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

Why did the Pentagon initially have twice as many toilets as needed? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article Comments on the article

Did you know?

Why did the Pentagon initially have twice as many toilets as needed?

In some Hollywood films about World War II, you can see American soldiers of different races fighting side by side. This is not true, since racial segregation in the US Army was only abolished in 1948. Racial division played a role in the construction of the Pentagon, which took place in 1942 - there were separate toilets for whites and blacks, and the total number of toilets was twice as much as needed. True, the signs "for whites" and "for blacks" were never hung due to the intervention of President Roosevelt.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

What is Kevlar?

This synthetic material is five times stronger than steel. They make bulletproof vests and military uniforms from it.

 Test your knowledge! Did you know...

▪ What is real estate?

▪ Where is the oldest observatory located?

▪ What does the star on the Mercedes-Benz logo symbolize?

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:

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Controlling objects using air currents 04.05.2024

The development of robotics continues to open up new prospects for us in the field of automation and control of various objects. Recently, Finnish scientists presented an innovative approach to controlling humanoid robots using air currents. This method promises to revolutionize the way objects are manipulated and open new horizons in the field of robotics. The idea of ​​controlling objects using air currents is not new, but until recently, implementing such concepts remained a challenge. Finnish researchers have developed an innovative method that allows robots to manipulate objects using special air jets as "air fingers". The air flow control algorithm, developed by a team of specialists, is based on a thorough study of the movement of objects in the air flow. The air jet control system, carried out using special motors, allows you to direct objects without resorting to physical ... >>

Purebred dogs get sick no more often than purebred dogs 03.05.2024

Caring for the health of our pets is an important aspect of the life of every dog ​​owner. However, there is a common assumption that purebred dogs are more susceptible to diseases compared to mixed dogs. New research led by researchers at the Texas School of Veterinary Medicine and Biomedical Sciences brings new perspective to this question. A study conducted by the Dog Aging Project (DAP) of more than 27 companion dogs found that purebred and mixed dogs were generally equally likely to experience various diseases. Although some breeds may be more susceptible to certain diseases, the overall diagnosis rate is virtually the same between both groups. The Dog Aging Project's chief veterinarian, Dr. Keith Creevy, notes that there are several well-known diseases that are more common in certain breeds of dogs, which supports the notion that purebred dogs are more susceptible to disease. ... >>

Random news from the Archive

Renewables have overtaken fossil fuels 01.02.2021

For the first time in 2020, European Union residents received more electricity from renewable sources than from fossil fuels, according to the annual report of the Agora Energiewende Institute in Berlin and analysts from Ember.

The report, which has been tracking the EU's energy sector since 2015, shows that last year renewables generated 38% of electricity compared to 37% from fossil fuels. This is due to the targeted policy of the European Union on the development of alternative energy sources.

Statistics say wind and solar power have almost doubled since 2015 and accounted for one-fifth of EU electricity generation last year. Also in 2020, electricity generation from coal decreased by 20% - now this source provides only 13% of all electricity produced in the EU.

"The rapid growth of wind and solar has led to a decline in coal, but this is just the beginning," Dave Jones, Ember's senior electricity analyst and lead author of the report, said in a statement. not only move away from coal by 2030, but also from gas-based energy generation, as well as to replace nuclear power plants that are closing, and to meet the growing demand for electricity from electric vehicles, heat pumps and electrolyzers.

The quarantine measures against COVID-19 last year led to a decrease in the demand for electricity around the world. According to the report, European demand fell by 4% in 2020, and the decline did not affect the growth of renewable energy sources. The report notes that since 2015, harmful emissions from electricity production in Europe have decreased by 29%.

EU leaders last month agreed to cut greenhouse gas emissions by 2030% by 55 from 1990 levels. In the United States, too, a similar process is underway: in May 2020, renewable sources provided more energy than coal for the first time since 1885.

Other interesting news:

▪ Nanotubes can change the shape of water

▪ City Samsung 5G

▪ New IEEE 802.15.4 Transceiver CC2520 for ZigBee Networks

▪ Massive natural source of greenhouse gases discovered

▪ Sneakers with electronics

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Power regulators, thermometers, heat stabilizers. Article selection

▪ Radar article. History of invention and production

▪ article Have people always lived in families? Detailed answer

▪ article Tansy balsamic. Legends, cultivation, methods of application

▪ article Electronic clock without... electronics. Encyclopedia of radio electronics and electrical engineering

▪ article Adjustable voltage stabilizers K1156ER2P and K1156ER2T. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024