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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.
In Newtonian mechanics, momentum is the product of the mass and velocity of an object. It is a standard mechanical quantity. It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity, then the object's momentum p is :
In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.
In mathematics, a tensor is an algebraic object that describes a multilinear relationship between sets of algebraic objects related to a vector space. Tensors may map between different objects such as vectors, scalars, and even other tensors. There are many types of tensors, including scalars and vectors, dual vectors, multilinear maps between vector spaces, and even some operations such as the dot product. Tensors are defined independent of any basis, although they are often referred to by their components in a basis related to a particular coordinate system.
In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit.
The Schrödinger equation is a linear partial differential equation that governs the wave function of a quantum-mechanical system. It is a key result in quantum mechanics, and its discovery was a significant landmark in the development of the subject. The equation is named after Erwin Schrödinger, who postulated the equation in 1925, and published it in 1926, forming the basis for the work that resulted in his Nobel Prize in Physics in 1933.
Kitengela is a municipality in the Kajiado County of Kenya, located 50 Kilometres south of the capital Nairobi, forming part of the greater Metropolitan Area. Kitengela begun as The Kitengela group ranch, made up of 18,292 ha and 214 registered members which was subdivided in 1988 in efforts by the Government to encourage private land ownership in pastoral systems, with the aim of intensifying and commercializing livestock production. After subdivision of the group ranch, land fragmentation and sales have continued at a steady and escalating pace. The human population within the Kitengela area has more than doubled in the last 10 years, from 6548 in 1989 to 17,347 in 1999 to 58,167 in 2009. There is also a town named Kitengela in the area.
In thermodynamics, the Gibbs free energy is a thermodynamic potential that can be used to calculate the maximum amount of work that may be performed by a thermodynamically closed system at constant temperature and pressure. It also provides a necessary condition for processes such as chemical reactions that may occur under these conditions.
In biochemistry, Michaelis–Menten kinetics is one of the best-known models of enzyme kinetics. It is named after German biochemist Leonor Michaelis and Canadian physician Maud Menten. The model takes the form of an equation describing the rate of enzymatic reactions, by relating reaction rate to , the concentration of a substrate S. Its formula is given by
In physics and relativity, time dilation is the difference in the elapsed time as measured by two clocks. It is either due to a relative velocity between them or to a difference in gravitational potential between their locations. When unspecified, "time dilation" usually refers to the effect due to 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.
A capacitor is a device that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. It is a passive electronic component with two terminals.
The Ngondi–Ngiri languages are a clade of Bantu languages. The Ngondi languages are coded Zone C.10 (Ngondi) in Guthrie's classification. According to Nurse & Philippson (2003), they form a valid node with the Ngiri language(s) of C.30:
Muthaiga is an affluent neighbourhood in the city of Nairobi. In 2019, media reports indicated that it was the most affluent and most expensive neighbourhood in the entire country.
Rhipicephalus gertrudae is a species of tick in the family Ixodidae. The specific epithet honors South African parasitologist Dr. Gertrud Theiler. The species was first circumscribed by Dr. Brouria Feldman-Muhsam.
Elsa Majimbo is a Kenyan internet comedienne from Nairobi. Her satirical monologues usually feature her eating potato crisps, leaning back to a pillow and using a pair of tiny 1990's sunglasses as a prop.
Lorna Irungu was a Kenyan TV presenter.
Boniface Mutinda Kabaka was a Kenyan politician who served as a Senator from Machakos County from 2017 until his death in 2020. He was a member of the Chama Cha Uzalendo party.
Kalekye Mumo is a Kenyan media personality and singer.
Victoria Rubadiri is a Kenyan journalist and TV anchor with Citizen TV in Kenya. In 2020, she won the 2020 BBC World News Komla Dumor Award.
References
- ↑ Mbati at Ethnologue (18th ed., 2015) (subscription required)
- ↑ Jouni Filip Maho, 2009. New Updated Guthrie List Online
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