Alexander Graham Bell

Alexander Graham Bell Calls Chicago from New York. Alexander Graham Bell is synonymous with telephone. But that wasn’t his only invention. He considered his most important creation to be the photophone — a device that transmitted sound on a beam of light. Although the photophone never met with the success that Bell hoped for, it became one of the key elements in the invention of fiber optics, which today transport over 80 percent of the world’s telecommunications. Bell, born in 1847, always considered himself first a teacher of the deaf; but his other interests made him an early leader of the National Geographic Society, and his inventions ranged from a prototype of the iron lung to methods of removing salt from sea water. His work with tetrahedrons led to the creation of the hydrofoil; in 1919, a hydrofoil he built with Casey Baldwin set a world water-speed record that was not broken until 1963. Alexander Graham Bell died on August 2, 1922, at his summer home on Cape Breton Island, Nova Scotia. People throughout North America were urged to refrain from making phone calls during his burial so that telephones would remain silent as a tribute. Bell died of pernicious anemia at the age of 75, at his private estate, Beinn Bhreagh, located on Nova Scotia’s Cape Breton Island near the village of Baddeck. He was buried atop Beinn Bhreagh mountain overlooking Bras d’Or Lake. He was survived by his wife and two of their four children.

Gregorian calendar

Gregorian calendar

The Gregorian calendar has undergone many alterations over the years. Originally there were only 10 months.

1. March
2. April
3. May
4. June
These first four were named after various gods. The next six were were named for numbers from the roman counting system.
5. Quintilius (5th)
6. Sextilius (6th)
7. September
8. October
9. November
10. December

After various revisions, another two months were added at the beginning of the year: Januarius and Februarius. Also, Quintilius and Sextilius were renamed Julius (July) and Augustis (August) after the famous Roman leaders.

‘A Roadside Stand’

Summary of ‘A Roadside Stand’ by Robert Frost

The poem compares the lives of people living in cities and the countryside. A small-time farmer builds a vegetable stand at the edge of the highway outside his house, in the hope that passing cars would buy the produce. He only wants to earn a living, he is not begging for money. However, no cars ever stop and the ones that even glance in the direction of the stand only comment about how the construction spoils the view of the surroundings. The farmer says that the obstructed view is not as important as the sorrow he feels on being ignored. He only wishes for some money so that he may experience the plush life portrayed by the movies and other media, which the political parties are said to be refusing him.

Sew your flare leg jeans into skinny leg jeans

Rip out the inside and outside seams until you get above the knee area. For straight-leg pants, mark new seams to be the same width as the leg near the knee area. For a tighter cuff, mark the cuffs to be a little thinner than the knee area and then mark new seams between your cuff marks and the knee area seams. For a boot-cut or normal cut, mark the cuffs to be a little wider than the knee area and then mark the seams between your cuff marks and the knee area seams. Finally, sew your seams along the marks. Once you are satisfied with the look, trim the extra fabric.

MOLECULES

How does water evaporate from water bodies like ocean and lake when the temperature of water is NOT 100 deg Celsius?
First of all, at the molecular level, whether a substance is in a solid, liquid, or gaseous state does not depend on the “temperature”, but on the energy of the individual molecules. At any given time, regardless of the temperature, there will be some molecules that have enough energy to be gaseous, some with just enough energy to be liquid, and some that have so little energy that they are solid. And individual molecules are constantly changing between these three states due to random collisions and other events that increase or decrease the energy.

Now, when we say that a significant quantity (more than can be quantified by a simple count of molecules) of a substance is “solid”, or “liquid”, or “gaseous”, it is because, at that temperature and pressure, the vast majority of the molecules have an energy level somewhere in the range that determines that state. Obviously, this varies with temperature. But the point is, regardless of temperature, all three states exist simultaneously, though only a small minority of the molecules will exist outside of the majority state.

Nuclear power plant

Nuclear power plant

Can an improperly managed nuclear power plant explode like a nuclear weapon?
No, it cannot. No mismanaged nuclear plant, no nuclear plant accident of any kind, can cause a massive nuclear explosion like the blast of a nuclear weapon. To understand this, begin with the idea that fissionable material requires a certain minimum amount (critical mass) of it to be brought together to spontaneously initiate fission, to make it go critical. In a nuclear weapon, the subcritical masses are driven together and held together for an extremely short interval of time by conventional explosives. The result of driving and holding the critical mass together is that it goes critical and instantly right through that to supercritical. This causes the nuclear chain to build exponentially and the number of fissions per unit of time goes through the roof. Boooooom. Maximum fission burn and big yield.
In a non-bomb situation, subcritical masses of fissionable material are brought together without being blasted together. They achieve criticality and fission begins instantly. Enough fissions will occur to generate enough heat to separate the critical mass to make the whole thing go subcritical. That will be the only goal of the fission reactions — to separate the critical mass into something subcritical.

Vitamin D

Vitamin d
Sunshine contains the best and most efficiently absorbed vitamin D. A fair skinned person can make up to 20,000 IU’s of Vitamin D in a half and hour with no risk of ever overdosing on vitamin D. Fatty fish and cod liver oil are the richest natural sources of vitamin d. Sun dried or UV light exposed mushrooms contain a surprising amount of vitamin D, up to 2500 IU’s per serving. These are virtually the only significant natural vitamin D sources. Many other foods are fortified with vitamin d by the manufacturers: Bread, milk and some orange juices are fortified, but the amounts vary and the stated amount of vitamin D on the label is not always the amount the food actually contains. When Keeping vegetable oils in the sun in an open pan provides Vitamin D absorbed from the sunshine.