Robert Andrews Millikan was born on the 22nd of March, 1868, in Morrison, Ill. (U.S.A.), as the second son of the Reverend Silas Franklin Millikan and Mary Jane Andrews. He led a rural existence in childhood, attending the Maquoketa High School (Iowa). After working for a short time as a court reporter, he entered Oberlin College (Ohio) in 1886. During his undergraduate course his favourite subjects were Greek and mathematics; but after his graduation in 1891 he took, for two years, a teaching post in elementary physics. It was during this period that he developed his interest in the subject in which he was later to excel. In 1893, after obtaining his mastership in physics, he was appointed Fellow in Physics at Columbia University. He afterwards received his Ph.D. (1895) for research on the polarization of light emitted by incandescent surfaces - using for this purpose molten gold and silver at the U.S. Mint.
On the instigation of his professors, Millikan spent a year (1895-1896) in Germany, at the Universities of Berlin and Göttingen. He returned at the invitation of A. A. Michelson, to become assistant at the newly established Ryerson Laboratory at the University of Chicago (1896). Millikan was an eminent teacher, and passing through the customary grades he became professor at that university in 1910, a post which he retained till 1921. During his early years at Chicago he spent much time preparing textbooks and simplifying the teaching of physics. He was author or co-author of the following books: A College Course in Physics, with S.W. Stratton (1898); Mechanics, Molecular Physics, and Heat (1902); The Theory of Optics,with C.R. Mann translated from the German (1903); A First Course in Physics, with H.G. Gale (1906); A Laboratory Course in Physics for Secondary Schools,with H.G. Gale (1907); Electricity, Sound, and Light,with J. Mills (1908); Practical Physics - revision of A First Course(1920); The Electron(1917; rev. eds. 1924, 1935).
As a scientist, Millikan made numerous momentous discoveries, chiefly in the fields of electricity, optics, and molecular physics. His earliest major success was the accurate determination of the charge carried by an electron, using the elegant "falling-drop method"; he also proved that this quantity was a constant for all electrons (1910), thus demonstrating the atomic structure of electricity. Next, he verified experimentally Einstein's all-important photoelectric equation, and made the first direct photoelectric determination of Planck's constant h (1912-1915). In addition his studies of the Brownian movements in gases put an end to all opposition to the atomic and kinetic theories of matter.
Private James Charles Martin is known as the youngest Australian soldier ever to die from active service. His enlistment papers state that he was born on 3rd January 1901 in Hawthorn New South Wales. At first only his parents and best friend Cec Hogan who was 16 at the time knew that James was 14 and 3 months when he joined the army because he looked a lot older for his age and his voice had already broken.
Physicist in the 1900 first started to consider the structure of atoms. The recent discovery of J. J. Thomson of the negatively charged electron implied that a neutral atom must also contain an opposite positive charge. In 1903 Thomson had suggested that the atom was a sphere of uniform positive electrification , with electrons scattered across it like plum in an pudding. (Later known as the Plum Pudding Model)
On April 1, 1855, he received his Bachelor’s Degree. Dmitri decided to keep a low-profile . A year later, on April 23, 1856 he received his Master’s Degree . Mendeleev decided to write a book called The Principles of Chemistry. He published it on August 1, 1861 . It was also presented here in a high school quality paperback edition . The publication was produced from a professional scan of an original edition of the book .
James B. McMillan was about 5 when he saw the Ku Klux Klan horsewhip his mother.
The removal of McClellan was a loss for the army of the Potomac. The loss of McClellan was a loss of experience in army techniques, an advanced knowledge of organization, and an very qualified general.
After being educated at Trinity College Dublin he moved to Queens University in Dublin where he worked as the Secretary of the Administrative Headquarters of the Queens Colleges. It was then when he produced his most important conceptions and calculations. His particular theory was that electrical charges in atoms are comprised of negatives which he would call electrons. He calculated the magnitude of a particle of electricity, or Stoney Unit which he would later name the electron in one of his papers in the Transactions of the Royal Dublin Society in 1891. The path taken to get to Stoney Units utilized the Stoney Scale which was the mathematical equation he developed to get his desired answer when
Throughout history, there have been people whose names and faces have become synonymous with the time periods in which they lived. For example, Julius Caesar is synonymous with the late Roman Republic and George Washington is synonymous with the American Revolution. Just like these two men, the name Robert E. Lee has become synonymous with the American Civil War. Not only did Lee rise to become the most important and recognizable person in the Southern Confederacy, but his honor and virtuous acts during and after the war made him a hero to modern-day Americans. Even though he fought for what many consider the morally erroneous side of the war, the virtues of his character have made him a figure in American history that should be honored and remembered.
His father had planned for him to follow him in a career in the clergy, but Lee wanted to go to school for science and, in 1893, enrolled at the Sheffield Scientific School of Yale University, one of the few institutions in the United States then offering a first-class scientific education. (Kraeuter, 74). De Forest went on to earn the Ph.D. in physics in 1899, with the help of scholarships, and money his parents made by working odd jobs. By this time he had become interested in electricit...
In the 1920s the new quantum and relativity theories were engaging the attentions of science. That mass was equivalent to energy and that matter could be both wavelike and corpuscular carried implications seen only dimly at that time. Oppenheimer's early research was devoted in particular to energy processes of subatomic particles, including electrons, positrons, and cosmic rays. Since quantum theory had been proposed only a few years before, the university post provided him an excellent opportunity to devote his entire career to the exploration and development of its full significance. In addition, he trained a whole generation of U.S. physicists, who were greatly affected by his qualities of leadership and intellectual independence.
In 2003, Roy Blount Jr. published the book Robert E. Lee through the Penguin Group Inc. This book is different then other books published about Lee due to the fact that this book looks behind the man in uniform, and shows how Lee became the legend that we know today. Blount brings an element of humor that some would not expect to find when writing about Lee. Through this type of writing, Lee transforms into the everyday person who we all can relate to.
In 1905 Einstein published the Annus Mirabilis papers. These papers explained each of his four main theories; the photoelectric effect, Brownian motion, Special Relativity and Matter energy-equivalence. These four works created the foundation for modern day physics and brought a new view to space, time and matter. Brownian motion is the random movement of small particles in either a gas or a liquid caused by collisions with the particles around them. Albert Einstein came up with mathematical equations that allowed him to determine the exact size of atoms. With these equations Einstein essentially provided the first substantial evidence that atoms actually do exist. Einstein’s second paper was on the photoelectric effect. Until Einstein, the photoelectric effect went unsolved. Einstein concluded that when a photon hits a metal surface, the photoelectrons on the metals surface are emitted as certain light frequencies. Thus proving that light has quanta meaning it has packets of energy. This has brought huge technological advancements and has a lot to do with many things that surround us today. Old television used video camera tubes that required the photoelectric effect to charge the screen and transform the image...
Robert E. Lee was the best General for the South, and out witted every Union General that was put against him. To Southerners, General Robert E. Lee is like a god figure to them. He inspired southerners even when the North dominated on the battle field, and is still praised by some radical believers in the confederate states. To the North, Robert E. Lee was a traitor to the United States and even lost his citizenship. Although he lost the war, Robert E. Lee is still a major face in history.
Hart, Ivor B. “Electrical Science.” The Great Physicists. Freeport, NY: Books For Libraries Press, 1970.
From a very young age, I have enjoyed reading a wide spectrum of topics. However, during high school, I had become preoccupied with physics during my studies and readings, and so I began to focus my attention upon the materials that further shed light on the science. The more I read, the more I became intrigued with the interrelations between matter, energy, and time and space motion illustrated through the science. Therefore, motivated to become one of Saudi Arabia’ few female physicists, upon graduating from high school I opted to major in the science that captivated me like no other....
The next big step in the discovery of the atom was the scientific test that proved the existence of the atom. After the discovery of the atom we had the discovery of subatomic particles. With the discovery of the subatomic particles came the research, which came from experiments that were made to find out more about the subatomic particles. This research is how we uncovered that most of the weight of an atom is from its nucleus. With the gold foil experiment, tested by Ernest Rutherford, he discovered the existence of the positively charged nucleus. He proved this when the experiment was happening, a small fraction of the photons th...