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John Henry Poynting
John Henry Poynting FRS (9 September 185230 March 1914) was an English physicist. He was the first professor of physics at Mason Science College from 1880 to 1900, and then the successor institution, the University of Birmingham until his death. Biography Poynting was the youngest son of Thomas Elford Poynting, a Unitarian minister. He was born at the parsonage of the Monton Unitarian Chapel in Eccles, Lancashire (his father serving as minister there from 1846 to 1878.) In his boyhood he was educated at the nearby school operated by his father. From 1867 to 1872 he attended Owens College, now the University of Manchester, where his physics teachers included Osborne Reynolds and Balfour Stewart. From 1872 to 1876 he was a student at Cambridge University, where he attained high honours in mathematics after taking grinds with Edward Routh. In the late 1870s he worked in the Cavendish Laboratory at Cambridge under James Clerk Maxwell. In 1880, he became the first professor of phys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monton
Monton is a suburb of Eccles, Greater Manchester, England, in the metropolitan borough of the City of Salford. Geography and administration Historically in Lancashire, Monton was administered by the municipal borough of Eccles until its abolition in 1974. The name Monton is of Saxon origin. A conservation area includes Monton Green; the Unitarian Church and a former school with caretaker's house; a lodge, built in 1875 to the Earl of Ellesmere's former estate, and a club-house with bowling green. The Green, once used as common land, is now formally laid out as gardens and lawns. Community The community is represented by the Monton Village Community Association, originally named the Monton Traders' Association, it was renamed to include both residents and traders. The association has a gardening group that maintains the flowerbeds and greens on a voluntary basis. The association organises an annual themed festival on the first Saturday of July each year and a parallel music fest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hopkins Prize
Hopkins is an English, Welsh and Irish patronymic surname. The English name means "son of Hob". ''Hob'' was a diminutive of ''Robert'', itself deriving from the Germanic warrior name ''Hrod-berht'', translated as "renowned-fame". The Robert spelling was introduced to England and Scotland after the Norman conquest of England. The surname Hopkins or Hopcyn is associated with, and most common in Wales. A typical Welsh patronym, it is first recorded as ''ab Popkyn'' (son of Hopkin) in Monmouth, in the early 17th century, and became a standardized surname under English law. The name in Ireland is an Anglicisation of the Irish Gaelic surname ''Mac Oibicin''. People surnamed Hopkins * Anna Hopkins (born 1987), Canadian actress * Andrew Delmar Hopkins (1857–1948), American entomologist * Sir Anthony Hopkins (born 1937), actor * Antony Hopkins, composer * A. G. Hopkins Antony Gerald Hopkins, British historian * Arthur F. Hopkins (1794–1865), husband of Juliet Opie Hopkins * Bernard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Field
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets. In addition, a nonuniform magnetic field exerts minuscule forces on "nonmagnetic" materials by three other magnetic effects: paramagnetism, diamagnetism, and antiferromagnetism, although these forces are usually so small they can only be detected by laboratory equipment. Magnetic fields surround magnetized materials, and are created by electric currents such as those used in electromagnets, and by electric fields varying in time. Since both strength and direction of a magnetic field may vary with location, it is described mathematically by a function assigning a vector to each point of space, cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Field
An electric field (sometimes E-field) is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field for a system of charged particles. Electric fields originate from electric charges and time-varying electric currents. Electric fields and magnetic fields are both manifestations of the electromagnetic field, one of the four fundamental interactions (also called forces) of nature. Electric fields are important in many areas of physics, and are exploited in electrical technology. In atomic physics and chemistry, for instance, the electric field is the attractive force holding the atomic nucleus and electrons together in atoms. It is also the force responsible for chemical bonding between atoms that result in molecules. The electric field is defined as a vector field that associates to each point in space the electrostatic ( Coulomb) for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poynting Theorem
In electrodynamics, Poynting's theorem is a statement of conservation of energy for electromagnetic fields developed by British physicist John Henry Poynting. It states that in a given volume, the stored energy changes at a rate given by the work done on the charges within the volume, minus the rate at which energy leaves the volume. It is only strictly true in media which is not dispersive, but can be extended for the dispersive case. The theorem is analogous to the work-energy theorem in classical mechanics, and mathematically similar to the continuity equation. Definition Poynting's theorem states that the rate of energy transfer per unit volume from a region of space equals the rate of work done on the charge distribution in the region, plus the energy flux leaving that region. Mathematically: where: * -\frac is the rate of change of the energy density in the volume. * ∇•S is the energy flow out of the volume, given by the divergence of the Poynting vector S. * Jâ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetism
In physics, electromagnetism is an interaction that occurs between particles with electric charge. It is the second-strongest of the four fundamental interactions, after the strong force, and it is the dominant force in the interactions of atoms and molecules. Electromagnetism can be thought of as a combination of electricity and magnetism, two distinct but closely intertwined phenomena. In essence, electric forces occur between any two charged particles, causing an attraction between particles with opposite charges and repulsion between particles with the same charge, while magnetism is an interaction that occurs exclusively between ''moving'' charged particles. These two effects combine to create electromagnetic fields in the vicinity of charge particles, which can exert influence on other particles via the Lorentz force. At high energy, the weak force and electromagnetic force are unified as a single electroweak force. The electromagnetic force is responsible for many o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavendish Laboratory
The Cavendish Laboratory is the Department of Physics at the University of Cambridge, and is part of the School of Physical Sciences. The laboratory was opened in 1874 on the New Museums Site as a laboratory for experimental physics and is named after the British chemist and physicist Henry Cavendish. The laboratory has had a huge influence on research in the disciplines of physics and biology. The laboratory moved to its present site in West Cambridge in 1974. , 30 Cavendish researchers have won Nobel Prizes. Notable discoveries to have occurred at the Cavendish Laboratory include the discovery of the electron, neutron, and structure of DNA. Founding The Cavendish Laboratory was initially located on the New Museums Site, Free School Lane, in the centre of Cambridge. It is named after British chemist and physicist Henry Cavendish for contributions to science and his relative William Cavendish, 7th Duke of Devonshire, who served as chancellor of the university and donated f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University
, mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Scholars of the University of Cambridge , type = Public research university , endowment = £7.121 billion (including colleges) , budget = £2.308 billion (excluding colleges) , chancellor = The Lord Sainsbury of Turville , vice_chancellor = Anthony Freeling , students = 24,450 (2020) , undergrad = 12,850 (2020) , postgrad = 11,600 (2020) , city = Cambridge , country = England , campus_type = , sporting_affiliations = The Sporting Blue , colours = Cambridge Blue , website = , logo = University of Cambridge logo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balfour Stewart
Balfour Stewart (1 November 182819 December 1887) was a Scottish physicist and meteorologist. His studies in the field of radiant heat led to him receiving the Rumford Medal of the Royal Society in 1868. In 1859 he was appointed director of Kew Observatory. He was elected professor of physics at Owens College, Manchester, and retained that chair until his death, which happened near Drogheda, in Ireland, on 19 December 1887. He was the author of several successful science textbooks, and also of the article on "Terrestrial Magnetism" in the ninth edition of the Encyclopædia Britannica. Career Stewart was born on 1 November 1828 at 1 London Row in Leith (north of Edinburgh), the son of William Stewart a tea-merchant, and his wife, Jane Clouston. His father was involved in business in Great Britain and Australia. He was educated at Dundee. He then studied Physics at the University of St Andrews, and the University of Edinburgh. Following his studies of physics at Edinburgh, he b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Osborne Reynolds
Osborne Reynolds (23 August 1842 – 21 February 1912) was an Irish-born innovator in the understanding of fluid dynamics. Separately, his studies of heat transfer between solids and fluids brought improvements in boiler and condenser design. He spent his entire career at what is now the University of Manchester. Life Osborne Reynolds was born in Belfast and moved with his parents soon afterward to Dedham, Essex. His father worked as a school headmaster and clergyman, but was also a very able mathematician with a keen interest in mechanics. The father took out a number of patents for improvements to agricultural equipment, and the son credits him with being his chief teacher as a boy. Reynolds showed an early aptitude and liking for the study of mechanics. In his late teens, for the year before entering university, he went to work as an apprentice at the workshop of Edward Hayes, a well known shipbuilder in Stony Stratford, where he obtained practical experience in the manufa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unitarianism
Unitarianism (from Latin ''unitas'' "unity, oneness", from ''unus'' "one") is a nontrinitarian branch of Christian theology. Most other branches of Christianity and the major Churches accept the doctrine of the Trinity which states that there is one God who exists in three coequal, coeternal, consubstantial divine persons: God the Father, God the Son (Jesus in Christianity, Jesus Christ) and Holy Spirit in Christianity, God the Holy Spirit. Unitarian Christians believe that Jesus was Divine_inspiration, inspired by God in his moral teachings and that he is a Redeemer (Christianity), savior, but not God himself. Unitarianism was established in order to restore "History of Christianity#Early Christianity (c. 31/33–324), primitive Christianity before [what Unitarians saw as] later corruptions setting in"; Unitarians generally reject the doctrine of original sin. The churchmanship of Unitarianism may include liberal denominations or Unitarian Christian denominations that are mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
