Planck

Planck is a german physicist. Seeking to explain the experimental spectrum (distribution of electromagnetic energy according to wavelength) of black body radiation, he introduced the hypothesis (1900) that oscillating atoms absorb and emit energy only in discrete bundles (called quanta) instead of continuously, as assumed in classical physics.

Vietnam

The people of Vietnam regained independence and broke away from China in AD 938 after their victory at the battle of Bạch Đằng River. Successive dynasties flourished along with geographic and political expansion deeper into Southeast Asia, until it was colonized by the French in the mid-19th century. Efforts to resist the French eventually led to their expulsion from the country in the mid-20th century, leaving a nation divided politically into two countries. Fighting between the two sides continued during the Vietnam War, ending with a Communist victory in 1975.
Emerging from this prolonged military engagement, the war-ravaged nation was politically isolated. The government’s centrally planned economic decisions hindered post-war reconstruction and its treatment of the losing side engendered more resentment than reconciliation.

Korea

Korea is a civilization, a formerly unified nation, and a geographic area currently composed of two sovereign states located on the Korean Peninsula in East Asia. It borders China to the northwest, and Russia to the northeast, and is separated from Japan to the east by the Korea Strait. Korea was divided in 1948, with the southern portion of the peninsula controlled by the capitalistic democracy South Korea, formally the Republic of Korea. In 1945, the Soviet Union and the United States agreed on the surrender and disarming of Japanese troops in Korea; the Soviet Union accepting the surrender of Japanese weaponry north of the 38th parallel and the United States taking the surrender south of it. This minor decision by allied armies soon became the basis for the division of Korea by the two superpowers, exacerbated by their inability to agree on the terms of Korean independence. The two Cold War rivals then established governments sympathetic to their own ideologies, leading to Korea's current division into two political entities: North Korea and South Korea.

Manhattan Project

The Manhattan Project was the project to develop the first nuclear weapon during World War II. Formally designated as the Manhattan Engineer District , it refers specifically to the period of the project from 1942-1946. The project's roots lay in scientists' fears since the 1930s that Nazi Germany was also investigating nuclear weapons of its own. Born out of a small research program in 1939, the Manhattan Project eventually employed more than 130,000 people and cost nearly $2 billion.

World War One

World War 1, also know as the First World War or the Great War, The War of the Nations and the War to End All Wars, was a world conflict lasting from 1914 to 1919, with the fighting lasting until 1918. The war was fought by the Allies on one side, and the Central Powers on the other. The war had become the second bloodiest conflict in recorded history. World War 1 became infamous for trench warfare, where troops were confined to trenches because of tight defenses.

History of Salsa

Salsa is not easily defined. Salsa is a distrillation of many Latin and Afro- Caribbean Dances. Each played a larg part in its evolution. Salsa is a similar to Mambo in that both have a pattern of six steps danced over eight counts of music.

History of Sunglasses

The first reason why they darkened glasses was because of smoke tinting, which was held in China before 1430. The Chinese judges had often worn sunglasses with quartz to hide the expression in their eyes while during a court case. They were first sold in the Atlantic City, New Jersey. When the year of 1930 struck was when everyone had to own a pair.

Inventors/Intention of the Coca Cola

On May, 1886, Dr. John Stith Pemberton, a local pharmacist, produced the syrup for Coca-Cola, and carried a jug of the new product down the street to Jacobs' Pharmacy, where it was sampled, pronounced "excellent" and placed on sale for five cents a glass as a soda fountain drink.

Nail Polish

Nail Polish can be traced back to at least 3000 BC when it originated in China. The Chinese found ways to use gum arabic, egg whites, gelatin, and bees wax to create varnishes and lacquers for the nails. In China, as weel as in Egypt, color represented social class. During the Chou Dynasty, circa 600 BC, gold and silver were the royal colors. Lower ranking women were only permitted to wear pale tones. Wearing royal colors without being royalty was punished by death. Modern nail polish is a actually a variation of car paint.

Jacqueline Barton

Jacqueline Barton probes DNA with electrons. She uses custom-made molecules to locate genes and study their arrangement. She has shown that some damaged DNA molecules do not conduct electricity. She has developed metal probes that can track how electrons move through DNA strands. By discovering how DNA can be damaged and how that damage can be reversed, Barton has been able to shed light on illnesses—like cancer— that begin with damaged DNA.

Marie Curie

Marie Curie was the first well-known woman scientist in the modern world. "Mother of Modern Physics" pioneer in research about radioactivity, a word she coined. She discovered and isolated polonium and radium, and established the nature of radiation and beta rays.1911, she was the first woman to be awarded a Nobel Prize, first person to win Nobel Prizes in two different scientific disciplines.

Prince Louis de Broglie

In 1923, Louis de Broglie published a brief note in the journal Comptes rendus containing an idea that was to revolutionize our understanding of the physical would at the most fundamental level. He has been troubled by a curious "contradiction" arising from Einstein's special theory of relativity. De Broglie noted that relativity theory predicts that, when such a particle is set in motion, its total relativistic energy will increase, tending to infinity as the speed of light is approached.

Yukawa, Hideki

Japanese phyicist who studied the force holding a nucleus together. He invented a theory in which the force between protons and neutrons was medicated by a massive virtual particle of about 200 electrons masses. Yukawa also predicted K-capture, in which an electron in the lowest hydroden energy level could be absorbed by the nucleur. He received the 1949 Nobel Prize in physics for his prediction of the pion.

Dmitri Mendeleev

Dmitri Mendeleev revolutionized our understanding of the properties of atoms and created a table that probably adorns every chemistry classroom in the world. In the late 1860s, Mendeleev began working on his great achievement: the periodic table of the elements. by arranging all of the 63 elements than known by their atomic weights, he managed to organize them into groups possessing similar properties. Where a gap existed in the table, he predicted a new element would one day be found and deducted its properties. and he was right. Three of those elements were found during his lifetime: gallium, scandium, and germanium. Mendeleev was able to successfully predict the properties of three elements that had not yes been discovered. The discovery of these elements provided the strongest support for his periodic table, a cornerstone both in chemistry and in our understanding of how universe is put together.

Neils Bohr

Neils Bohr made numerous contributions to our understanding of the structure of properties of atoms. In, 1913, Bohr published a theory about the structure of the atom based on an earlies theory of Rutherford's. Bohr expanded upon this theory by proposing that electrons travel only in certain successively larger orbits. He suggested that the outer orbits could hold more electrons than the inner ones, and that these outer determine the atom's chemical properties.

Rutherford is best known for devising the names alpha,beta,and gamma rays to classify various forms of "rays" which were poorly understood at his time. Rutherford deflected alpha rays with both electric and magnetic fields in 1903. He also observed that the intensity of radioactivity fell off with time, and named the halving time the "half-life."