What was the purpose of the first street light? Detailed answer

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

What was the purpose of the first street light? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

What was the purpose of the first street light?

The first street traffic light, installed near the Houses of Parliament in London in 1868, was intended to control the flow of pedestrians.

During the day, signals were given using two wings (like a railway semaphore), and at night - through red and green gas lamps.

Said British prototype street light did not last long: shortly after installation, it exploded, killing a London policeman.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

In which city does the function of the subway perform ordinary trams, which have a door on only one side?

In the 1970s, due to the difficult transport situation in Volgograd, there was a need for a metro, but Volgograd was not then a "millionaire" city, and it was not supposed to have a metro. They found a way out of the situation by tearing out three underground stations under the busiest intersections and launching the so-called "light rail" through them, which traveled both through tunnels and along ordinary streets. An additional complication was that it was not possible to find trams with doors on both sides of the car. Therefore, in order to ensure that the tram always arrives on the platform on the right side, the tunnels underground were built with twists. A similar light rail system has also been built in the Ukrainian city of Krivoy Rog.

Test your knowledge! Did you know...

▪ Who was Confucius?

▪ Since when has the Tour de France been played?

▪ What animal does the word leather come from?

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:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Ceramic motor tested 15.10.2017

The American company GE Aviation, together with specialists from the US Army, has completed testing of the first prototype of a new gas turbine engine, in the design of which ceramic matrix composites are widely used.

In 2011, the US military announced that they needed new gas turbine engines that were economical to operate and relatively inexpensive to manufacture. Power plants are planned to be installed on different types of helicopters. According to GE Aviation, the use of ceramics in the design of advanced engines will reduce the cost of their production by simplifying the production cycle and reduce the cost of operation due to the longer resource of ceramic composites compared to traditional materials.

Ceramic matrix composites have a wide operating temperature range, and parts made from such materials can normally operate at much higher temperatures than conventional metal alloy elements. This allows you to expand the operating range of the propulsion system as a whole. Ceramic parts will be produced using XNUMXD printing technology.

According to the requirement of the military, the new engines must have 80% more power density than modern power plants. In addition, the specific fuel consumption of new engines should be 35% less, and the estimated resource - 20% more. Finally, the cost of production and maintenance of the project's power plants should be reduced by 45%. GE Aviation believes these requirements are quite feasible.

Testing of the first engine prototype in autumn 2016. The engine went through many start and stop cycles, it was tested for the possibility of long-term operation. During the test, the developers monitored the reliability of the compressor, combustion chamber and turbine, and these elements were tested both as part of the power plant and separately on a special stand. Other details about the inspections carried out were not disclosed.

Power plants will be produced in several versions. They will differ from each other in size and power. Depending on the version, the engines will be able to develop power from five to ten thousand horsepower (3,7-7,4 thousand kilowatts). First of all, the power plants are considered as a replacement for the T700 engines of the AH-64 Apache and UH-60 Black Hawk helicopters. T700 engines in several dozen versions have been produced since 1973 and have a power of 6,1 to 7,4 kilowatts.

Other interesting news:

▪ Hive for wild bees

▪ The fastest ant

▪ Google Edge TPU microprocessor for machine learning algorithms

▪ Minibus without a driver

▪ tailor lasers

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Tools and mechanisms for agriculture. Article selection

▪ article Russia focus. Popular expression

▪ article Where was the guillotine invented? Detailed answer

▪ green article. Legends, cultivation, methods of application

▪ article Method of manufacturing chokes for TX. Encyclopedia of radio electronics and electrical engineering

▪ article Grounding and electrical safety protective measures. Connections and connections of grounding, protective conductors and conductors of the potential equalization and equalization system. 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