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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

Why can scientists ignore the forces of attraction among particles in a gas under ordinary conditions?

Scientists can ignore intermolecular forces in a gas under ordinary conditions because gases have weak forces of attraction compared to liquids and solids. The particles in a gas are far apart and move freely, resulting in negligible interaction between individual particles. Hence, the effects of these weak forces are often minimal and can be disregarded for many practical purposes.

When did Sir Alexander Fleming win the Nobel Peace Prize?

Sir Alexander Fleming was never awarded the Nobel Peace Prize. But he was awarded, jointly with Florey and Chain, the 1945 Nobel Prize for Physiology and Medicine.

What did Louis Pasteur look like?

Louis Pasteur was a French chemist and microbiologist who is often depicted with his signature bald head and long beard in historical photographs and paintings. He had a stern and focused expression in many of his portraits, reflecting his dedication to scientific research and discoveries.

Famous scientist and what they are famous for?

robert bunesn

bunsen burner

isaac newton newton meters

marie curie

curies (cures)

What kind of questions do physical scientist ask?

Physical scientists ask questions about the natural world and how it works. They explore topics like the composition of matter, the forces that govern nature, and the behavior of particles at the smallest scales. Their questions often seek to understand the fundamental laws that govern the universe.

Why do engineers and scientist always use the newton rather than a kilogram as the standard unit of force?

Engineers and scientists use newtons as the standard unit of force because force is a vector quantity that includes both magnitude and direction. Newtons can directly represent this vector nature of force, whereas kilograms are a unit of mass and do not inherently imply directionality. Using newtons makes it easier to accurately describe and calculate forces in equations and models.

Why did Bohr use hydrogen to study the energy emitted from atoms?

Since hydrogen only has one electron that constantly absorbs and emits energy while transitioning back and forth through its energy levels, Bohr realized that each of hydrogens orbits was quantized only allowing an electron of specific energy, frequency & wavelength, to occupy it. So he deduced that hydrogen only has a specific line spectum, thus it has specified "orbits" rather than "orbitals" of probability distribution of electrons.

Names of Greek weather scientists?

One of the prominent name of Greek weather scientist is Theophrastus. Theophrastus compiled a book on weather forecasting, called the Book of Signs.

English scientist who formulated the law of gravity?

Sir Isaac Newton formulated the law of gravity in the 17th century. He proposed that every object in the universe is attracted to every other object by a force called gravity, which depends on the mass of the objects and the distance between them.

The halflife of Na24 is 15 hours When there are 1000 atoms of Na24 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 45 hours there are atoms of Na24 rema?

There will be 125 atoms of Na24 remaining in the sample after 45 hours. This calculation is based on the fact that after 3 half-lives (45 hours/15 hours per half-life), the original 1000 atoms would have reduced by a factor of 2 three times, resulting in 1000/2/2/2 = 125 atoms remaining.

What is J J Thomson known for?

J. J. Thomson is known for discovering the electron and formulating the plum pudding model of the atom. He was awarded the Nobel Prize in Physics in 1906 for his work on the conduction of electricity in gases.

What was invented by Nikola Tesla in 1888?

In 1888 Tesla designed the first practical system of generating and transmitting alternating current for electric power. The American rights to this epoch-making invention were bought by the American inventor George Westinghouse, who demonstrated the system for the first time at the World's Columbian Exposition in Chicago. Two years later Tesla's alternating-current motors were installed at the Niagara Falls power project.

What year did Nikola Tesla start college?

1879 at the Technical University of Graz, Austria, and the University of Prague.

Did Nikola Tesla invent the light bulb?

No, Tesla did not invent the light bulb. The first electric light was made in 1800 by Humphry Davy, an English scientist. Much later, in 1860, the English physicist Sir Joseph Wilson Swan (1828-1914) was determined to devise a practical, long-lasting electric light. In 1877, the American Charles Francis Brush manufactured some carbon arcs to light a public square in Cleveland, Ohio, USA. Thomas Alva Edison experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting. Lewis Howard Latimer (1848-1928) improved the bulb by inventing a carbon filament (patented in 1881); Latimer was a member of Edison's research team, which was called "Edison's Pioneers." In 1903, Willis R. Whitney invented a treatment for the filament so that it wouldn't darken the inside of the bulb as it glowed. In 1910, William David Coolidge (1873-1975) invented a tungsten filament which lasted even longer than the older filaments.

Which scientist would study matter at very low temperatures?

A physicist known as a "cryogenicist" or "low-temperature physicist" would study matter at very low temperatures. These scientists specialize in understanding the unique properties and behavior of materials when subjected to extremely cold temperatures.

Who is the person who studies the weather?

An individual that studies meteorology, which is the study of weather, is referred to as a meteorologist. Normally, a degree in meteorology and/or in atmospheric science is required to start in the field of forecasting.

What would happen if a scientist didn't use SI units?

Using non-SI units can lead to confusion, errors in calculations, and difficulty in communicating results with other scientists. It can also hinder reproducibility and comparability of experiments conducted by different researchers. Standardizing units with the SI system ensures consistency and precision in scientific measurements.

Problem scientists are trying to solve?

Scientists are working to understand the impact of climate change on global ecosystems, develop sustainable energy sources to combat climate change, and find solutions to prevent the spread of infectious diseases.

Why might a scientist use a light meter?

A scientist might use a light meter to measure the intensity of light in a particular environment. This can help them understand how light levels may affect biological processes, growth patterns, or the behavior of organisms.

What is a random interesting alligator fact?

Alligators have been on Earth for over 150 million years, making them living dinosaurs. They have the strongest bite of any animal, with a bite force that can exert over 2000 pounds per square inch. Alligators are also known to use tools, such as sticks, to attract prey by luring birds looking for nesting materials.

What is the variable that responds to the variable being changed by the scientist?

Usually this is called the DEPENDENT VARIABLE (DV, aka outcome, criterion...). The scientist manipulates the independent variable and it is their HOPE that the dependent variable will change in response.

How much do nuclear scientists earn?

Nuclear scientists can earn a wide range of salaries depending on factors such as experience, location, and employer. On average, nuclear scientists in the United States can earn anywhere from $70,000 to over $150,000 per year.

Can you give 15 Filipino physicists and their contributions?

  1. D. L. de Leon - Pioneer in nuclear physics in the Philippines, known for his research on cosmic rays.
  2. Gregorio Zara - Invented the two-way television telephone, a precursor to modern video communication technology.
  3. Roger Posadas - Known for his work on optical properties of perovskite materials for solar cell applications.
  4. Caesar Saloma - Expert in optical microscopy and nanotechnology, known for his contributions to the development of super-resolution microscopy techniques.
  5. Jose J. B. Reyes - Pioneered the study of depolarized light scattering for structural analysis of materials.
  6. Gonzalo T. Catan - Known for his work on electron spin resonance spectroscopy and its applications in material science.
  7. Alfredo Mahar Francisco Lagmay - Contributed to the study of magnetism and spin electronics in nanostructures.
  8. Lydia Tansinsin - Researcher in biophysics, particularly known for work on biomolecular interactions.
  9. Jonas Quilang - Specializes in theoretical physics, focusing on condensed matter and quantum mechanics.
  10. Queena N. Lee-Chua - Noted for her research in mathematical physics, particularly in chaos theory and fractals.
  11. Nilo A. Alcala - Known for his contributions to the study of ultrasonic velocities and their application in material science.
  12. Joel Ty-Torres - Expert in theoretical physics, with research interests in string theory and quantum field theory.
  13. Ignacio - Studies focused on condensed matter physics and nanotechnology.
  14. Reginaldo Joseph L. Dimaano - Expert in computational physics, with research on complex systems and nonlinear dynamics.
  15. Percival Almoro - Known for his work on optical coherence tomography and its applications in biomedical imaging.

Was Nikola Tesla Croat or Serbian?

He was an Serbian.

EDIT

A man of Serbian origin who spent his first 18 years in Croatia.

EDITED by VedaDavid

He was born in Croatia being a part of Austro-Hungarian Empire at that time. He has Croatian origin, but his father was an Orthodocs priest due to the circumstances I will elaborate bellow.

I'll try to stay as objective as possible, therefore I will give you the link to the original article in Croatian language about hidden Tesla's diary being kept in Belgrade and the translation of the most interesting parts, so you can check the facts for yourselves and come to your own conclusions.

Here is the link to the original article in Croatian language: http://www.hkv.hr/hkvpedija/znanost/5907-zato-beograd-skriva-tajni-dnevnik-nikole-tesle.html

Translation of the most interesting parts:

"It's sensational how Croatian public is unaware of the details from Tesla's diary, although Professor Ljubica Stefan, an author of the numerous books, made ​​sure that many interesting information get in Croatia. While living in Belgrade she had an opportunity to see Tesla's diary and some other secret data. They thought she was a Serb, so they showed her some closely guarded secrets - said Dr. Peter Vucic, a famous Croatian intellectual whose specialty is geopolitics. A record from the secret diary of Nikola Tesla, hidden at the state archives in Belgrade, was released at the 55th page of the book Speech to Croats on the right path."

Here is what Tesla said:

"I'm glad that Croats consider me to be one of them too, since my ancestors were Croatian noblemen by the name of Draganić from Zadar. As Croatian noblemen they came to Lika in 16th century and stayed there. My ancestors came to Lika via Novi Vinodol (note: historical part of Croatia). My mother's ancestors, by the name of Kalinić, were also Croatian nobles of the New Vinodol. Due to the circumstances, my great-grandfather had to go to Bosanska Krajina (Turkish Croatia - note: historical name for occupied parts of medieval Croatia) and there married Orthodox girl and converted to Orthodox Christianity. He had protruding front teeth so he was called by tool named "tesla" used to process wood, and hence my current name Tesla. This was actually a nickname. My grandfather was an officer in the regiment of Lika, and my father an Orthodox arch priest! "

Nota bene: Tesla studied at Graz and Prag, as did most of the Croats of that time. Before that he paused for two years in his schooling, due to the pressure of his parents to become a priest which was against his wishes. Tesla wanted to leave his manuscripts "to his old country". Tito's diplomat and Tesla's cousin Savo Kosanović deliberately misinterpreted his wish and that's how they ended up in Belgrade instead of the country he was born and raised in.

Now I hope this makes it a bit more clear what the origin of this genius is.