How many years after the invention of cans were can openers introduced? Detailed answer

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

How many years after the invention of cans were can openers introduced? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

How many years after the invention of cans were can openers introduced?

The method of food preservation was invented in 1772 in the Netherlands, and by the 1820s, tin cans were common in Europe and the United States. However, they were supposed to be opened with improvised means, for example, with a hammer and a chisel. The first can opener was patented in 1855, 40 years later knives with a rotating wheel appeared, and only in 1925 the American company Star Can Opener added a second wheel. It was this design that turned out to be the most successful and is used with minor changes in most modern openers.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How do plants get their food?

We must not forget that plants are living beings. They eat, they drink, they breathe, and without enough good food they die. With the exception of two classes of plants, all plants produce their own food. Let's see how they do it.

The wonderful substance chlorophyll, found in the cells of the leaves, and sometimes in the trunk and flowers, helps the living tissues of the plant to absorb the energy of sunlight. This energy transforms inanimate (inorganic) elements into life-giving (organic) substances. This truly amazing process is called photosynthesis. But carbon is required for the formation of living matter. The plant gets carbon from the air. (It exists in the air in combination with oxygen in the form of carbon dioxide).

Once the plant receives carbon, it must combine it with other substances in order to build up the various parts of the plant. The most important of these is water, from which the plant obtains hydrogen. The water must also contain certain minerals needed by the plant. These are mainly compounds of nitrogen, sulfur, phosphorus, potash, calcium, magnesium, sodium and iron.

The plant receives this water and minerals through its roots. One of the reasons the roots have such long tips is that the plant can reach new areas of soil with them in search of water and minerals.

Thousands of small hairs on young root shoots pass through the soil particles and extract the necessary substances from them. Some of the water obtained from the roots is used to make sugar. The rest of the water evaporates from the leaves, and the plant wilts when the water evaporates through the leaves faster than it enters through the roots.

By the way, did you know that no two leaves are exactly the same, even if they have the same shape and color?

Test your knowledge! Did you know...

▪ How do trees grow?

▪ Who is Messalina?

▪ Who in his life managed to visit both a dwarf and a giant?

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

Mini PC SZBOX S100 21.10.2023

SZBOX has introduced its new product - a mini PC called S100, which is so small that it can easily be placed in your pocket.

The dimensions of the SZBOX S100 are 2.8 x 2.8 x 1.8 inches. The device is equipped with a detachable external dual antenna to connect to the AX6's WiFi 600 and Bluetooth 5.2. Inside is a quad-core Intel Alder Lake N-4 processor, 100GB of LPDDR16 RAM clocked at 5MHz, and up to 4800TB of M.1 SATA SSD storage.

Intel UHD graphics with 24 execution units can handle dual monitors at 4K resolution and a 60Hz refresh rate. The manufacturer has successfully implemented a cooling system with a blower fan placed on a copper radiator.

The device is equipped with three USB 3.2 Type-A ports, two HDMI 2.0 ports, 2.5 Gbps LAN and a 3.5 mm audio jack. The new product is powered via a separate USB-C port.

The basic version costs $184.

Other interesting news:

▪ Light from the sewers

▪ Cars wink at the oncoming

▪ crystalline cellulose

▪ Alarm signal - in every house

▪ Camel Dairy Farm

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site RF power amplifiers. Article selection

▪ article Permanent Revolution. Popular expression

▪ article In which city are Japanese tourists diagnosed with a special mental disorder? Detailed answer

▪ article Athlete-instructor. Job description

▪ article Calculation of the inductor of the make-up current source for semi-automatic welding. Encyclopedia of radio electronics and electrical engineering

▪ article Automatic timer for TV. 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