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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 tool would a scientist use to see an atom?
A scientist would use a high-powered electron microscope to see an atom. This microscope uses electrons instead of light to visualize objects at the atomic scale. Due to the smaller wavelength of electrons compared to light, the electron microscope can achieve much higher resolution, allowing scientists to observe atomic structures.
How do characteristic properties help scientists identify subtances?
Characteristic properties such as boiling point, melting point, density, and solubility are unique for specific substances and can be used to accurately identify them. By comparing experimental values to known values for these properties, scientists can determine the identity of a substance. These properties provide reliable and consistent data that can distinguish one substance from another.
What is it called when scientists quantify their observations of their surroundings?
This is the elaboration of a theory.
Some women choose to pose nude for various reasons, including artistic expression, body positivity, empowerment, or financial gain. It is a personal choice that each individual makes based on their own values and motivations.
It's the only way to discover if the medicine is any good or not. The tests have to be randomised so that each patient does not know whether he is receiving the medicine or just a placebo, and the person administering the dose to that patient must not know if it's the medicine or a placebo.
How much work is necessary to lift 10 kg 5 m in the air?
The work done to lift the 10 kg object 5 m in the air is calculated using the formula: Work = force x distance. The force required to lift the object (weight) is 10 kg * 9.8 m/s^2 (acceleration due to gravity) = 98 N. Therefore, the work done is 98 N * 5 m = 490 Joules.
What element is shiny and a good conductor of heat and electricity?
The element that is shiny and a good conductor of heat and electricity is copper. Copper is widely used in electrical wiring, electronics, and plumbing due to its excellent conductivity properties.
How do scientist measure the salinity?
Scientists measure salinity in water by using a device called a refractometer or by collecting water samples and conducting a chemical analysis in a lab to determine the amount of dissolved salts. Another common method is to use conductivity meters to measure the electrical conductivity of the water, which is directly related to its salinity.
What summarizes Planck theory of light?
The relation between the energy (E) of a photon and the frequency (v) of its associated electromagnetic wave is called the Planck relation or the Planck--Einstein equation:
E = hv
h is the Planck constant which as a value of about 6.626 * 10-34 J*s (a very very small number)
Who are the two scientist who used radioactive isotopes?
Marie Curie and Ernest Rutherford are two scientists who used radioactive isotopes in their research. Marie Curie discovered the elements polonium and radium and pioneered the use of radiation in medicine. Ernest Rutherford conducted experiments with radioactive decay that led to the development of modern atomic theory.
What chemicals do endocrie glands make?
Endocrine glands produce and release hormones, which are chemical messengers that travel through the bloodstream to target cells and regulate various physiological processes in the body. Some examples of hormones produced by endocrine glands include insulin (produced by the pancreas), adrenaline (produced by the adrenal glands), and estrogen and testosterone (produced by the ovaries and testes, respectively).
For every action there is an equal and opposite reaction True or false?
The first part of Newton's third law of motion is:
"Actioni contrariam semper et æqualem esse reactionem: ..."
Translation:
'To the action there is always opposed and equal reaction: ...'
This is often expressed as:
"To (or For) every action there is always an equal and opposite reaction: ..."
Therefore the phrase in the question is not right because Newton's law has been incorrectly quoted. The word 'always' should also have been included.
However, given that the quoted phrase is only half of what Newton actually stated as his third law, then, in the field of motion physics, it can only be HALF RIGHT at most.
And even if Newton's law had been correctly quoted, it is still only a law of motion physics, so it is not necessarily 'right' in the sense of a being a universal truism.
Dalton's Law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases in the mixture.
What wastes do the lungs excrete in small amounts?
The lungs excrete waste products such as carbon dioxide and water vapor during the process of respiration. Carbon dioxide is a byproduct of metabolism and is removed from the body when you exhale. Small amounts of other volatile compounds, such as acetone and alcohol metabolites, are also excreted through the lungs.
What country was Dmitri mendeleyev from?
Dmitri Mendeleev was from Russia. He was a Russian chemist who is best known for creating the periodic table of elements.
Why do scientists say wave model of light instead of saying that light is a wave?
Saying "wave model of light" emphasizes that light exhibits wave-like behavior in certain situations, such as interference and diffraction, but can also display particle-like behavior in other situations. This acknowledges the dual nature of light as both a wave and a particle.
What does Scientists describe the set of information for each form of trait as?
Scientists describe the set of information for each form of trait as alleles. Alleles are alternative forms of a gene that can determine a specific trait in an individual. Each individual inherits two alleles for each gene, one from each parent.
How do scientists define acceleration?
Acceleration is defined as the rate of change of velocity with respect to time. It is a vector quantity, meaning it has both magnitude (how quickly speed is changing) and direction (the direction in which the speed is changing). Formally, acceleration (a) can be expressed as a = (v_f - v_i)/t, where v_f is the final velocity, v_i is the initial velocity, and t is the time interval over which the change occurs.
Why cant scientist alone make a decision to ban an appliances?
Scientists may provide critical data and recommendations based on their expertise, but decisions to ban appliances often require input from various stakeholders, including lawmakers, policymakers, industry representatives, and the public. Factors such as economic impact, feasibility of alternatives, and societal benefit all play a role in such decisions, and a collaborative approach involving multiple perspectives is typically needed to make a well-informed and balanced decision.
What properties help scientist identify minerals?
Scientists can identify minerals by examining physical properties such as color, luster, hardness, cleavage, and crystal form. They can also test for properties like streak, specific gravity, and reaction to acid to further narrow down the identification of a mineral. These combined properties help scientists distinguish one mineral from another.
Where did nobelium get its name?
The name of nobelium was in the honor of the well known chemical engineer Alfred Nobel.
What decade did scientists first split the atom?
Scientists first split the atom in the 1930s. The process of splitting the atom, known as nuclear fission, was achieved by Otto Hahn and Fritz Strassmann in 1938. This discovery laid the groundwork for the development of nuclear power and weapons.
How does a scientist prove a theory?
A scientist can prove a theory by conducting experiments, collecting data, and analyzing results to see if they consistently support the predictions made by the theory. The more evidence that aligns with the theory's predictions, the stronger the support for the theory. Additionally, peer review and replication of results by other scientists help confirm the validity of a theory.
How did Antoine Lavoisier communicate with other scientist?
Antoine Lavoisier communicated with other scientists through letters, scientific papers, and attending scientific meetings and conferences. He was known to collaborate with other prominent scientists of his time, such as Joseph Priestley and Jean-Baptiste Meusnier, to exchange ideas and discuss their research. Additionally, Lavoisier was a member of the French Academy of Sciences, providing him with a platform to interact with his peers in the scientific community.
