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Scientists
This category is for questions about the people who apply the scientific method to solve problems, introduce new concepts, and strive to explain the natural world.
9,527 Questions
What is bohr-sommerfeld model of an atom?
With A. Sommerfeld's extension of the Bohr theory in 1915-1916, it was turned into a powerful tool of atomic research and adopted and further developed by German physicists in particular. The new and more general Bohr-Sommerfeld theory described the atom in terms of two quantum numbers, while Bohr had originally used only one quantum number. With this extension the theory provided an explanation of the Stark effect, the ordinary Zeeman effect, and the fine structure of the hydrogen spectrum. Other developments based on X-ray spectroscopy were less successful, as were attempts to understand the structure of the helium atom. Yet, by 1920 nearly all physicists accepted the theory as the only viable framework for atomic and quantum research. But not all agreed: the chapter includes an account of conceptual and other objections against the theory raised by J. Stark in Germany and a few other physicists.
What were the Chinese Alchemists and European Alchemists trying to do?
(sry for spelling) Chinese alchemists were looking for the secret to immortality for there emperor but they failed every time and the person who failed was sentence to death they be lived that to get to this goal they needed a philoshper stone
European alchemists were diff rent thought they did not want immortality they wanted to be able to change rocks,silver,copper,etc in to gold so that they would have an endless supply
What impact did Rene descartes have?
Descartes has been heralded as the first modern philosopher. He is famous for having made an important connection between geometry and algebra, which allowed for the solving of geometrical problems by way of algebraic equations.
Remains of musical instruments, pictures, and writings
How did Alexander Fleming impact your world?
Alexander Fleming made a great contribution to the world though an accident led to the discovery. he noticed in a petri plate of his that there was a clearing area of bacteria around a golden yellow mold. this mould was penicillin species . therefore he thought that the bio product released by penicillin is responsible for the restriction of growth for the bacilli species.
Because of this, Howard Florey and Ernst Chain managed to concentrate penicillin and make it effective to use as a antibacterial drug. It is currently a medical standard today
Name three Caribbean scientist and what he or she does?
There are many scientists from the Caribbean region, which is chosen randomly. Dr. Samuel Rawlins, Dr. Roger Pulwarty and Prof. John Agard are the most popular among all the scientist in the Caribbean region.
He simply discovered many things that makes technology where we are!
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In astronomy he used measurements made by Tycho Brahe to do many complicated calculations to discover the shape of the planets' orbits. The results were published as the three laws of planetary motion in 1618. They were found to give good results when used to predict the future positions of the planets. For this work Kepler is recognised as one of the founders of modern astronomy.
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Kepler worked with Tycho Brahe for several years. Brahe had no great skill in science or mathematics, but was a METICULOUS and precise observer. Based largely on Brahe's observations, Kepler was able to determine that the planet Mars - and by extension, all the other planets - traveled in elliptical paths under the influence of a force that was inversely proportional to the square of the distance between the Sun and the planet. This paved the way for Newton's development of calculus and the math that describes gravity.
Why did Flossie Wong-Staal leave the UCSD faculty?
She went to a company called Immusol Inc in San Diego, which she co-founded.
He only discovered quantum theory is all. No biggie, just pretty much all of physics for the last 120 years or so is based on his work.
Why does a scientist repeat scientific investigations?
Scientists often repeat scientific investigations to verify that the results for a hypothesis or a group of hypotheses are correct. This can lead to a scientific theory.
How long have scientist been genetically modifying humans?
The first successful gene therapy to modify human DNA was in 1990. However, the practice of genetic modification in humans has been controversial and is subject to strict regulations and ethical considerations.
In newtons third law the action and reaction forces?
The two forces are of the same magnitude, act in opposite directions, and act on different objects.
Benjamin franklin a man of reason and science was a good example of the?
Benjamin Franklin, a man of reason and science, is a good example of an American diplomat, statesman and scientist.
What type of scientist studies natural hazards such as volcanoes and tornadoes?
It depends on the type of hazard. Volcanoes are studied by volcanologists, who are a variety of geologist, while tornadoes are studied by meteorologists (weather scientists). Most natural hazards are of a meterological or geological nature, and so will be studied by meteorolgists or geologists.
An object that attracts material containing iron and always faces the same direction when moving freely is lodestone.
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Nickel and cobalt are two other metals, in addition to iron, that display this type of magnetism. If you wish more information it is available on the wikipedia article entitled 'magnet'.
They have kept the traits that they need in their environment and that same environment has caused them to lose the others. They fit the niche perfectly without any excess traits. Thus saving energy and reproducing more efficiently.
What did Stephen hawking do to affect your lives?
My life... I enjoyed his book, A Short History of Time. References to him on the TV show 'Big Bang Theory' are very entertaining.
Can a tornado turn into a hurricane?
No. Tornadoes are short-lived small scale weather events and are a byproduct of thunderstorms. Hurricanes are long-lived, large scale storm systems.
Why is probability important to a scientist?
Some but not all scientific models are based on the ability to determine the likelihood that a given experimental outcome has happened by chance alone. If you have an accurate understanding of how the variables in the experiment change when nothing in particular is affecting them, then you have a way to establish some confidence that your outcome is the result of your experimental procedure and not the result of purely random events. The experimental 'lingo' is that the researcher has to determine if the 'Null Hypothesis' can be rejected. The Null Hypothesis is that the experimental outcome is not significantly different from what you would expect if the experiment had no effect at all.
As an example, if the probability in the natural world is that some event will happen by chance only one tenth of one percent of the time, then when I observe that event as my experimental outcome, I can be reasonably sure that my procedure has brought about the event; it is so unlikely that it happened by chance. It is not perfect, but few scientific procedures are. This also highlights the importance of replicating studies or of doing meta-analyses of experimental data gathered in many experiments to further reduce the likelihood that observed outcomes are nothing more than chance events.
What have scientist learned from volcanoes?
The petrology of igneous rock, the nature of volcanic erutpions themeslves,and, together with all the other processes and events, the nature of plate tectonics.
Also of course, their studies aim to improve eruption prediction, but these processes and their effects are all notoriously difficult to predict, as we saw recently when Italy effectively made it illegal to make a mistake.
