What grade did the teacher give at school for the design of the current US flag? Detailed answer

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

What grade did the teacher give at school for the design of the current US flag? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

What grade did the teacher give at school for the design of the current US flag?

The US flag changes every time new states are admitted to the state - new stars are added. The last time the flag was changed was in the late 1950s, when Hawaii and Alaska were granted statehood. More than 1500 options for the location of the stars came to the name of the president, and in the end, the option of 18-year-old Robert Heft was adopted. Although the teacher at the school, to whom he first handed over the project, put 4 with a minus for the work, and jokingly promised to revise the grade if the US Congress approved his project. And so it happened - and the teacher had to change the grade to 5.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

When did a simple pencil appear?

Simple pencil. Here it is on the table in front of me. Black heart, wooden shirt. Why is it called simple? Because it is very simply arranged, and also because it is easy for them to draw a line on paper. And such a pencil appeared quite recently, in the XNUMXth century.

The core of a pencil is made from a mixture of graphite powder and clay. This mixture is prepared in the following way. First, graphite is finely-finely ground - many times finer than cosmetic powder. Then it is mixed with clay. If a hard pencil is made, clays are added more, and if soft, less. This mass is pressed through special narrow holes to obtain rods, then these rods are dried in special ovens. Now you need to "sew" clothes to the pencil. They make it from wood: cedar, poplar, linden, alder. Small boards are cut out, which must first lie down and dry. Then six grooves are made in them, where the slates are laid, as if in cribs. From above they are covered with the same planks and glued, pressing the planks to each other. When the boards stick together, they are cut into six blanks. The blanks are sanded, painted four times and varnished twice. And now the pencils are ready!

According to the "character" pencils are different: some have a soft, gentle "heart", others have a hard, like flint, and there are pencils of medium hardness. This is evidenced by the marking that is affixed to the pencils - letters and numbers showing the degree of hardness or softness.

Reliable pencils will help you out when the pen can be capricious and refuse to work. Scuba divers take them with them to make sketches underwater. Even weightlessness and frost do not have a detrimental effect on them! So in space and at polar stations you can’t do without them.

Test your knowledge! Did you know...

▪ Who Invented Perfume?

▪ Why do boys lose their voices?

▪ What were the main stages of the post-war development of the leading Western European countries (20-50s of the XNUMXth century)?

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

The camera leaves traces 14.12.2006

As you know, you can find the barrel from which the bullet flew out by the characteristic scratches left by each firearm on soft lead. It is possible to find a typewriter on which any text is printed by the smallest individual features of the letters.

And American programmer Jessica Friedrich from the State University of New York has found a way to identify digital cameras in the same way. Each camera introduces so-called noise into the picture - interference associated with the incorrect functioning of individual elements of the photosensitive matrix. For example, in a single-color section of an image, individual pixels (dots that make up the picture) may have a different color.

The pattern of such electronic noise is unique to each camera. A program developed by Jessica Friedrich detects these fingerprints. During testing, the program, without a single error, determined that 3000 shots belonged to ten cameras.

According to FBI experts, the new method can be useful, for example, when searching for manufacturers and distributors of pornographic images.

Other interesting news:

▪ Ventilator to help you breathe

▪ More smart meters

▪ Heat to electricity

▪ Handbag lighting

▪ LMP8100 Programmable Gain Amplifier

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Lightning protection. Article selection

▪ article by Wanda Blonskaya. Famous aphorisms

▪ article What chemical element got its name from the poisoning of rodents? Detailed answer

▪ Belen's paper is black. Legends, cultivation, methods of application

▪ article A transistor probe that can be used to test transistors without soldering them out of the circuit. Encyclopedia of radio electronics and electrical engineering

▪ article Simple quartz 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