Search results
Results from the WOW.Com Content Network
Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature. It shows that the radiation has a maximum intensity at a wavelength that depends on the temperature, and that the energy of the radiation is quantized in units of hν, where h is the Planck constant.
Chemical oxidation of metals with water and liberation of H 2 Of these, high-pressure gas cylinders and liquid hydrogen in cryogenic tanks are the least practical ways to store hydrogen for the purpose of fuel due to the extremely high pressure required for storing hydrogen gas or the extremely low temperature required for storing hydrogen liquid.
Mass near the M87* black hole is converted into a very energetic astrophysical jet, stretching five thousand light years. In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame, where the two quantities differ only by a multiplicative constant and the units of measurement.
Density functional theory (DFT) is a quantum mechanical method for studying many-body systems, such as atoms, molecules, and solids. DFT uses functionals of the electron density to determine the properties of the system, and has applications in physics, chemistry, and materials science.
Learn about the branch of chemistry that uses computer simulations to solve chemical problems. Find out the history, methods, applications, and challenges of computational chemistry.
A Platonic solid is a regular polyhedron with congruent faces and vertices. Learn about the five Platonic solids, their names, shapes, and how they relate to the elements, the Solar System, and the golden ratio.
Entropy is a measure of the randomness, disorder, or uncertainty in a system or a process. It is related to the second law of thermodynamics, which states that entropy cannot decrease in an isolated system. Learn about the history, definitions, and applications of entropy in physics, chemistry, biology, and information theory.
Isaac Newton was a mathematician, physicist, astronomer, alchemist, theologian, and author who formulated the laws of motion and universal gravitation. He published his findings in the Principia, which explained the Solar System's heliocentricity and the motion of objects on Earth and celestial bodies.