Thanks to whom did stores stop selling goods to different customers at different prices and introduced price tags? Detailed answer

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

Thanks to whom did stores stop selling goods to different customers at different prices and introduced price tags? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article

Did you know?

Thanks to whom did stores stop selling goods to different customers at different prices and introduced price tags?

Until the middle of the 19th century, when making purchases, it was necessary to ask the seller for a price, which he could name depending on the appearance of the buyer, and bargain with him. The situation, when different people pay different prices for the same product, seemed wrong to American Quakers. They actively encouraged the shops to put up price tags.

Pretty soon, store owners saw the benefits in more than just moral terms: with price tags, there was less time to train new employees who no longer had to memorize the allowable price range for each item, and overall sales increased due to the increased speed of customer service.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why did Rupert Grint refuse to write an autobiographical essay about his character Ron Weasley?

Before filming began on Harry Potter and the Prisoner of Azkaban, director Alfonso Cuarón asked the actors playing the three main characters to write an autobiographical essay about their characters in the first person. Rupert Grint, who plays Ron Weasley, refused to write, explaining that Ron would never do such a thing. Cuarón replied that Grint understood his character correctly.

Test your knowledge! Did you know...

▪ Why do we need grammar?

▪ What were the tanks?

▪ Who ordered to build another wall around the besieged city for their own protection?

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

Recycling plastic into graphene with the release of pure hydrogen 13.09.2023

The problem of environmental pollution from plastic waste continues to require new solutions, motivating scientists around the world to look for innovative ways to combat this environmental threat. However, what if plastic could be made into a valuable resource rather than just waste? This question remains open, but scientists from Rice University in the US are proposing a unique solution that could change the plastic industry and make it more environmentally sustainable.

A team of scientists from Rice University's Department of Materials Science and Nanoengineering has developed a technology to convert waste plastic into valuable graphene, releasing pure hydrogen in the process. Hydrogen is considered one of the potential fuels of the future, since its combustion can provide high levels of energy and only produce ordinary water as a byproduct. This makes hydrogen cleaner than refined petroleum and more convenient as a vehicle fuel than electric batteries, which require a long charge.

It should be noted that hydrogen is already used in industry, but current methods of its production are associated with carbon dioxide emissions, and for every ton of hydrogen, 10 to 12 tons of carbon dioxide are produced.

The new method developed by the scientists involves a technology known as "pulsed Joule heating". By passing a short electrical pulse through the plastic, which instantly heats up to 2,5 thousand degrees Celsius due to the resistance of the current, carbon atoms are bonded into the graphene structure, and hydrogen atoms are released as a pure gas.

Despite the need to further reduce the cost of production, this method has the potential to change the game, allowing for more efficient recycling of plastic waste, the production of green hydrogen and the creation of graphene, which on the market costs between $60 and $200 per ton.

Kevin Vis, one of the authors and a chemist, said: "Our method reduces CO2 and greenhouse gas emissions from hydrogen production by 84% compared to existing industrial steam methane reforming methods." This approach could be the key to a cleaner, more sustainable future energy and plastic waste management.

Other interesting news:

▪ Another form of ice discovered

▪ Depression reduces the effectiveness of chemotherapy

▪ Ecological and cheap crops

▪ The concentration of carbon in the air has reached a record high

▪ The computer was taught to distinguish male text from female

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Frequency synthesizers. Selection of articles

▪ article by William Makepeace Thackeray. Famous aphorisms

▪ What do bananas grow on? Detailed answer

▪ Article Chastukha common. Legends, cultivation, methods of application

▪ article Loop antenna. Encyclopedia of radio electronics and electrical engineering

▪ article Starting induction motors. 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