| Rheotanytarsus | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Chironomidae |
| Tribe: | Tanytarsini |
| Genus: | Rheotanytarsus Thienemann & Bause, 1913 |
| Species | |
Rheotanytarsus is a genus of European non-biting midges in the subfamily Chironominae of the bloodworm family Chironomidae.
The electron is a subatomic particle whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron's mass is approximately 1836 times smaller than that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, ħ. Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle. Like all elementary particles, electrons exhibit properties of both particles and waves: They can collide with other particles and can be diffracted like light. The wave properties of electrons are easier to observe with experiments than those of other particles like neutrons and protons because electrons have a lower mass and hence a longer de Broglie wavelength for a given energy.
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest. Formally, a kinetic energy is any term in a system's Lagrangian which includes a derivative with respect to time.
Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles. The difference in mass between the reactants and products is manifested as either the release or the absorption of energy. This difference in mass arises due to the difference in nuclear binding energy between the atomic nuclei before and after the reaction. Nuclear fusion is the process that powers active or main sequence stars and other high-magnitude stars, where large amounts of energy are released.
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The Boltzmann constant is the proportionality factor that relates the average relative kinetic energy of particles in a gas with the thermodynamic temperature of the gas. It occurs in the definitions of the kelvin and the gas constant, and in Planck's law of black-body radiation and Boltzmann's entropy formula, and is used in calculating thermal noise in resistors. The Boltzmann constant has dimensions of energy divided by temperature, the same as entropy. It is named after the Austrian scientist Ludwig Boltzmann.
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound in air is about 343 metres per second, or one kilometre in 2.9 s or one mile in 4.7 s. It depends strongly on temperature as well as the medium through which a sound wave is propagating. At 0 °C (32 °F), the speed of sound is about 331 m/s.
The Nissan Stagea is a station wagon produced by Nissan from 1996 to 2007. It was originally produced by Nissan in 1996 as direct competition for the Subaru Legacy Touring wagon in Japan, and was exclusive to Nissan Prince Store Japanese dealerships. The Stagea shares many mechanical parts with the Nissan Skyline and Nissan Laurel.
All motorised road vehicles in India are tagged with a registration or licence number. The Vehicle registration plate number is issued by the district-level Regional Transport Office (RTO) of respective states — the main authority on road matters. The number plates are placed in the front and back of the vehicle. By law, all plates are required to be in modern Hindu-Arabic numerals with Latin letters. The international vehicle registration code for India is IND.
In fluid dynamics, drag is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers or between a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which are nearly independent of velocity, the drag force depends on velocity.
In linear algebra, an eigenvector or characteristic vector of a linear transformation is a nonzero vector that changes at most by a scalar factor when that linear transformation is applied to it. The corresponding eigenvalue, often denoted by , is the factor by which the eigenvector is scaled.
Guangdong Oppo Mobile Telecommunications Corp., Ltd, doing business as OPPO, is a Chinese consumer electronics and mobile communications company headquartered in Dongguan, Guangdong. Its major product lines include smartphones, smart devices, audio devices, power banks, and other electronic products.
The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water.
Horntvedt Glacier is a small glacier flowing to the north coast of the island of Bouvetøya. It is situated immediately east of Cape Circoncision. It was first charted in 1898 by a German expedition under Carl Chun, and recharted in December 1927 by a Norwegian expedition which named it for Harald Horntvedt (1879-1946), the captain of the expedition ship Norvegia.
The Necker Nymph is a submersible vehicle operated by Virgin Aquatic from the 32-metre yacht Necker Belle, which is based at the Virgin Limited Edition resort Necker Island in the British Virgin Islands.
Upland Britain refers to a semi-natural habitat of the British Isles, generally above 1,000 feet (300 m), including:
Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is a strain of coronavirus that causes COVID-19, the respiratory illness responsible for the ongoing COVID-19 pandemic. The virus previously had a provisional name, 2019 novel coronavirus (2019-nCoV), and has also been called human coronavirus 2019. First identified in the city of Wuhan, Hubei, China, the World Health Organization declared the outbreak a Public Health Emergency of International Concern on 30 January 2020, and a pandemic on 11 March 2020. SARS‑CoV‑2 is a positive-sense single-stranded RNA virus that is contagious in humans.
Dobbs v. Jackson Women's Health Organization, No. 19-1392, 597 U.S. ___ (2022), is a landmark decision of the U.S. Supreme Court in which the court held that the Constitution of the United States does not confer a right to abortion, and overruled both Roe v. Wade (1973) and Planned Parenthood v. Casey (1992). The decision leaves abortion rights or restrictions to be defined at the state level.
EASA CS-25 is the European Aviation Safety Agency Certification Specification for Large Aeroplanes.
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