Coulomb's inverse-square law, or simply Coulomb's law, is an experimental law of physics that quantifies the amount of force between two stationary, electrically charged particles. The electric force between charged bodies at rest is conventionally called electrostatic force or Coulomb force. Although the law was known earlier, it was first published in 1785 by French physicist Charles-Augustin de Coulomb, hence the name. Coulomb's law was essential to the development of the theory of electromagnetism, maybe even its starting point, as it made it possible to discuss the quantity of electric charge in a meaningful way.The law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. Coulomb studied the repulsive force between bodies having electrical charges of the same sign: It follows therefore from these three tests, that the repulsive force that the two balls — [that were] electrified...

Goulash (Hungarian: gulyás) is a soup or stew of meat and vegetables seasoned with paprika and other spices. Originating in Hungary, goulash is a common meal predominantly eaten in Central Europe but also in other parts of Europe. It is one of the national dishes of Hungary and a symbol of the country.Its origin may be traced back as far as the 10th century, to stews eaten by Hungarian shepherds. At that time, the cooked and flavored meat was dried with the help of the sun and packed into bags produced from sheep's stomachs, needing only water to make it into a meal. Earlier versions of goulash did not include paprika, as it was not introduced to Europe until the 16th century. Etymology The name originates from the Hungarian gulyás [ˈɡujaːʃ] (listen). The word gulya means 'herd of cattle...

Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs (which is a member of the order decapoda), some of which can be eaten.The term "prawn" is used particularly in the United Kingdom, Ireland, and Commonwealth nations, for large swimming crustaceans or shrimp, especially those with commercial significance in the fishing industry. Shrimp in this category often belong to the suborder Dendrobranchiata. In North America, the term is used less frequently, typically for freshwater shrimp. The terms shrimp and prawn themselves lack scientific standing. Over the years, the way they are used has changed, and in contemporary usage, the terms are almost interchangeable. Shrimp vs. prawn The terms shrimp and prawn are common names, not scientific names. They are vernacular or colloquial terms which lack the formal definition of scientific terms. They are not taxa, but are terms of convenience with little circumscriptional significance. There is no reason to avoid using the terms shrimp or...

A sconce (the word is derived from the late Latin via Old French) is a lamp-holder – either a candlestick or lantern with a handle, or a lamp fixed to a wall. In the latter case the light is usually, but not always, directed upwards and outwards, rather than down. The sconce is a very old form of fixture, historically used with candles and oil lamps. Such modern wall fittings are more often called wall lights or wall lamps. They can provide general room lighting, and are common in hallways and corridors, but they may be mostly decorative. A sconce may be a traditional torch, candle or gaslight, or a modern electric light source affixed in the same way. Usage and history Sconces can be placed on both the interior and exterior walls of buildings. In pre-modern usage, these usually held candles or gas flame, and torches respectively. Historically, candle sconces were often made of silver or brass from the 17th century, with porcelain and ormolu coming into use during the 18th century. The light of the candle flame was often intensified by a reflecting backplate. Using brackets, the candle or gas...

Ernest Henry "Chinese" Wilson (15 February 1876 – 15 October 1930), better known as E. H. Wilson, was a notable British plant collector and explorer who introduced a large range of about 2000 Asian plant species to the West; some sixty bear his name. Career Wilson was born in Chipping Campden, Gloucestershire but the family soon moved to Shirley, Warwickshire, where they set up a floristry business. He left school early for employment at the local nursery of Messrs. Hewitt, Warwickshire, as apprentice gardener, and, aged 16, at the Birmingham Botanical Gardens; there he also studied at Birmingham Municipal Technical School in the evenings, receiving the Queen's Prize for botany. In 1897 he began work at the Royal Botanic Gardens, Kew, where he won the Hooker Prize for an essay on conifers. He then accepted a position as Chinese plant collector with the firm of James Veitch & Sons, who were eager above all to retrieve the dove tree, Davidia involucrata. "Stick to the one thing you are after," advised Harry Veitch, who had more than a dozen plant hunters on payroll, "and don't spend time...

In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. The refractive index determines how much the path of light is bent, or refracted, when entering a material. This is described by Snell's law of refraction, n1 sin θ1 = n2 sin θ2, where θ1 and θ2 are the angle of incidence and angle of refraction, respectively, of a ray crossing the interface between two media with refractive indices n1 and n2. The refractive indices also determine the amount of light that is reflected when reaching the interface, as well as the critical angle for total internal reflection, their intensity (Fresnel's equations) and Brewster's angle.The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium...

Macroeconomics is a branch of economics which deals with the performance, structure, behavior, and decision-making of an economy as a whole. For example, using interest rates, taxes, and government spending to regulate an economy's growth and stability. This includes regional, national, and global economies. According to a 2018 assessment by economists Emi Nakamura and Jón Steinsson, economic "evidence regarding the consequences of different macroeconomic policies is still highly imperfect and open to serious criticism."Macroeconomists study topics such as GDP (Gross Domestic Product), unemployment (including unemployment rates), national income, price indices, output, consumption, inflation, saving, investment, energy, international trade, and international finance. Macroeconomics and microeconomics are the two most general fields in economics. The United Nations Sustainable Development Goal 17 has a target to enhance global macroeconomic stability through policy coordination and coherence as part of the 2030 Agenda. Development Origins Macroeconomics descended from the once...

Black Panther: Wakanda Forever is a 2022 American superhero film based on the Marvel Comics character Black Panther. Produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures, it is the sequel to Black Panther (2018) and the 30th film in the Marvel Cinematic Universe (MCU). Directed by Ryan Coogler, who co-wrote the screenplay with Joe Robert Cole, the film stars Letitia Wright as Shuri / Black Panther, alongside Lupita Nyong'o, Danai Gurira, Winston Duke, Florence Kasumba, Dominique Thorne, Michaela Coel, Tenoch Huerta Mejía, Martin Freeman, Julia Louis-Dreyfus, and Angela Bassett. In the film, the leaders of Wakanda fight to protect their nation in the wake of King T'Challa's death. Ideas for a sequel began after the release of Black Panther in February 2018. Coogler negotiated to return as director in the following months, and Marvel Studios officially confirmed the sequel's development in mid-2019. Plans for the film changed in August 2020 when Black Panther star Chadwick Boseman died from colon cancer, with Marvel choosing not to recast his role of T'Challa. The return of other...

The Washington University Medical Center (WUMC), located in St. Louis, Missouri, is a large scale health-care focused commercial development located in St. Louis' Central West End neighborhood. The Washington University Medical Center Redevelopment Corporation focuses on developing public-private partnerships that promote infrastructure and housing development in the WUMC area. As of 2017, the executive director of WUMCRC is Brian Phillips. Although many of the institutions are affiliated with Washington University in St. Louis, most of the institutions of WUMC are independent of the university. Notably, the medical center is anchored by Barnes-Jewish Hospital and also houses the Washington University Medical School. History The Washington University Medical Center was incorporated in 1962. It is located on over 230 acres (93 ha) directly to the east of Forest Park. WUMC serves as the anchor of the Central West End community, a commercial and residential neighborhood with numerous shops, restaurants, and night spots.WUMC is accessible from the Kingshighway at I-64/US 40 or the Central West End station of the St. Louis...