Who made the first clock? Detailed answer

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

Who made the first clock? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

Who made the first clock?

When we talk about watches, we mean a device for measuring time. But man had known ways of counting time long before he invented such devices. Sunrise and sunset were the first indicators of time. The increase and decrease in shadows from sticks, stones and trees also served to tell time. The movement of the stars also served man as something like a giant clock. He noticed that as the night wore on, various stars became visible.

The ancient Egyptians divided the night into twelve time periods corresponding to the rising of 12 stars. They divided the day in the same way, and our 24-hour day is based on the Egyptian division of day and night. The Egyptians also made shadow clocks - wooden bars with signs. Ultimately, these shadow or sundials, having 12 periods for dividing the day, were the first hours.

The next types of clocks were water and fire. The sliced candle counted time as it burned from slice to slice. And in the water clock, a plate with a small hole at the bottom was placed on the water. After a certain time, the floating saucer fills with water and sinks. About 2000 years ago, man invented another type of clock - hourglasses. They consisted of two hollow glass vessels connected so that the sand could be poured from one to the other. The upper vessel was filled with sand in such quantity that it spilled out into the hole within an hour.

Around 140 BC, the Greeks and Romans used the cogwheel to improve water clocks. The float, placed in the vessel, rose when the water flowed in a thin stream into the vessel. It was connected to a gear wheel. The wheel turned the hand, which gradually moved from one hour mark to another. And after 1400 years, the first mechanical clock was invented. The load was tied to a string, which turned the coil, which in turn moved the axis of the cogwheels and gears. The wheels turned the arrow on the dial.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

When was the first underground launched?

On January 10, 1863, the first underground transport line was put into operation in London. It took almost 40 years until the first subway line (in combination with ground and elevated transport) was put into operation in Berlin, and although in Russia underground transport projects were considered as early as 1902, the first subway line was put into operation only in 1935.

Test your knowledge! Did you know...

▪ What is a sound barrier?

▪ Where does the people live, all of whose representatives have the same blood type?

▪ What animals can eat bacteria grown on their own bodies?

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

Human warmth - a threat to computer security 15.07.2018

Human fingers leave thermal fingerprints on keyboard keys, which can be exploited by hackers.

The new attack was called Thermanator. According to experts from the University of California, Irvine, attackers can learn the password that a person recently entered on a physical PC keyboard using a thermal imager to capture mid-range waves. By pointing the camera at the keys within a minute of typing, hackers will see a thermal fingerprint.

Scientists say that in order to carry out an attack, hackers will have to install a thermal imager over the victim in advance. At the same time, even non-specialists will be able to decrypt the received data.

Experts have concluded that it is time to move away from passwords as a way to protect user data and equipment, as high-quality thermal cameras and other similar devices become more accessible to the mass consumer.

Earlier, researchers discovered a technical bug in the popular Google Chrome browser, thanks to which hackers can intimidate the victim with a "boot bomb".

Other interesting news:

▪ Electric bus Lancaster eBus

▪ Moving objects with sound

▪ Grasshopper oil

▪ The value of dark chocolate for older people with diseased arteries

▪ 100 volt voltage regulator LM5008

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Field strength detectors. Article selection

▪ article Hydroelectric power plant. History of invention and production

▪ article When Did Bhutanese Know You Can Smoke Marijuana? Detailed answer

▪ Loqua's article. Legends, cultivation, methods of application

▪ article Biogas plants. Encyclopedia of radio electronics and electrical engineering

▪ article Tunable bandpass filter. 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