Right-hand rule

In mathematics and physics, the right-hand rule is a common mnemonic for understanding orientation of axes in three-dimensional space. Most of the various left- and right-hand rules arise from the fact that the three axes of three-dimensional space have two possible orientations. One can see this by holding one's hands outward and together, palms up, with the fingers curled, the thumb out-stretched. If the curl of the fingers represents a movement from the first or x-axis to the second or y-axis the third or z-axis can point along either thumb. Left- and right-hand rules arise when dealing with coordinate axes, spirals, electromagnetic fields, mirror images, enantiomers in mathematics and chemistry. In vector calculus, it is necessary to relate the normal to a surface to the curve bounding it. For a positively-oriented curve C bounding a surface S, the normal to the surface n̂ is defined such that the right thumb points in the direction of n̂, the fingers curl along the orientation of the bounding curve C.

Coordinates are right-handed. For right-handed coordinates the right thumb points along the Z axis in the positive direction and the curl of the fingers represents a motion from the first or X axis to the second or Y axis; when viewed from the top or Z axis the system is counter-clockwise. For left-handed coordinates the left thumb points along the Z axis in the positive direction and the curled fingers of the left hand represent a motion from the first or X axis to the second or Y axis; when viewed from the top or Z axis the system is clockwise. Interchanging the labels of any two axes reverses the handedness. Reversing the direction of one axis reverses the handedness. Reversing two axes amounts to a 180° rotation around the remaining axis. In mathematics, a rotating body is represented by a vector along the axis of rotation; the length of the vector gives the speed of rotation and the direction of the axis gives the direction of rotation according to the right-hand rule: right fingers curled in the direction of rotation and the right thumb pointing in the positive direction of the axis.

This allows some easy calculations using the vector cross product. No part of the body is moving in the direction of the axis arrow. By coincidence, if the thumb is pointing north, Earth rotates in a prograde direction according to the right-hand rule; this causes the Sun and stars to appear to revolve westward according to the left-hand rule. A helix is a curved line formed by a point rotating around a center while the center moves up or down the Z-axis. Helices are either right- or left-handed, curled fingers giving the direction of rotation and thumb giving the direction of advance along the Z-axis; the threads of a screw are a helix and therefore screws can be right- or left-handed. The rule is this: if a screw is right-handed point your right thumb in the direction you want the screw to go and turn the screw in the direction of your curled right fingers; when electricity flows in a long straight wire it creates a circular or cylindrical magnetic field around the wire according to the right-hand rule.

The conventional current, the opposite of the actual flow of electrons, is a flow of positive charges along the positive Z-axis. The conventional direction of a magnetic line is given by a compass needle. Electromagnet: The magnetic field around a wire is quite weak. If the wire is coiled into a helix all the field lines inside the helix point in the same direction and each successive coil reinforces the others; the advance of the helix, the non-circular part of the current and the field lines all point in the positive Z direction. Since there is no magnetic monopole the field lines exit the +Z end, loop around outside the helix, reenter at the −Z end; the + Z end. If the fingers of the right hand are curled in the direction of the circular component of the current, the right thumb points to the north pole. Lorentz force: If a positive electric charge moves across a magnetic field it experiences a force according Lorentz force, with the direction given by the right-hand rule. If the curl of the right fingers represents a rotation from the direction the charge is moving to the direction of the magnetic field the force is in the direction of the right thumb.

Because the charge is moving, the force causes the particle path to bend. The bending force is computed by the vector cross product; this means that the bending force increases with the velocity of the particle and the strength of the magnetic field. The force is maximum when the particle direction and magnetic fields are at right angles, is less at any other angle and is zero when the particle moves parallel to the field. Ampère's right-hand grip rule is used either when a vector must be defined to represent the rotation of a body, a magnetic field, or a fluid, or vice versa, when it is necessary to define a rotation vector to understand how rotation occurs, it reveals a connection between the current and the magnetic field lines in the magnetic field that the current created. André-Marie Ampère, a French physicist and mathematician, for whom the rule was named, was inspired by Hans Christian Ørsted, another physicist who experimented with magnet needles. Ørsted observed that the needles swirled when in the proximity of an electric current-carrying wire, concluded that electricity could create magnetic fields.

This rule is used in two different applications of Ampère's circuital law: An electric current passes through a straight wire. When the thumb is pointed

Rayat Shikshan Sanstha

Rayat Shikshan Sanstha is an Indian educational organisation founded by Karmaveer Bhaurao Patil in 1919. Its aim was to provide education to students who, due to caste, religion of economic status, had not had the opportunity; the organisation has its headquarters in Maharashtra state. The first school, of "Earn & Learn" concept, was started at the village Kale from Karad taluka of Satara district by Patil in Balawantrao Ganaptrao Desai's home, a founder member and independence activist. In 1882, Jyotirao Phule made a demand for providing free education for all; the social reforms movement in the 19th century in Maharashtra brought changes in the educational systems. Schools in rural areas were started by the princely states of Baroda and Mysore; the Shahu Ji Maharaj of Kolhapur brought in the reservation system in education. Bhaurao Patil was influenced by these reforms and took to educating the children of rural Maharashtra. In October 1919, during the meeting of Satyashodhak Samaj at Karle, Patil decided to form Rayat Shikshan Sanstha.

"Rayat" meaning "subjects" was used as "peasants class" by the British government. Patil started with providing hostel facilities in towns to children of rural areas and thus making it possible for them to take education, he established schools and teacher's training institutes. In May 1959, when Patil died, the organization had 38 hostels, 578 non-governmental schools, 3 colleges and 6 teacher's training institutes. In 2012, the Sanstha had 42 colleges, 17 post-graduate colleges, 438 Secondary Schools, 8 Training Colleges, 28 Primary Schools, 17 Pre-Primary Schools, 68 Cosmopolitan hostels, 7 Administrative Offices, 8 Ashramshalas, 2 ITI, 1 Engineering College and 57 Ancillary branches. Dr. Ambedkar National Award Rayat Shikshan Sanstha

Brenda Song

Brenda Song is an American actress. She started in show business as a child fashion model, her early television work included roles in the television shows Fudge and 100 Deeds for Eddie McDowd. After many commercials and television roles in the late 1990s, Song appeared in The Ultimate Christmas Present, won a Young Artist Award for her performance. In 2002, Song signed a contract with Disney Channel and starred in the 2002 Disney Channel Original Movie Get a Clue and made significant contributions to the channel, including starring in films such as Stuck in the Suburbs, Wendy Wu: Homecoming Warrior, many other productions. In 2005, Song began playing the lead female role of London Tipton in The Suite Life of Zack & Cody, reprised the role on The Suite Life on Deck. Song made her transition into mainstream movies in 2010 when she appeared in the critically acclaimed film The Social Network, she starred in the short indie film First Kiss. In 2012 and 2013, she had recurring roles in New Girl. In 2013–2014, she starred in the Fox TV series Dads.

In October 2014, Song signed a talent holding deal with Fox and 20th Century Fox Television to star in a television project. Since Song has been cast in several television pilots for NBC and CBS, she starred in the CBS drama Pure Genius. In 2017, Song was cast in two new movies: Angry Angel. Song was cast in 2018 in the TV series Station 19 for a multi-episode arc. Song starred in the Netflix psychological thriller film Secret Obsession, has lent her voice to Anne Boonchuy in Disney's animated series Amphibia. Brenda Song was born in California, a suburb of Sacramento, to a Thai and Hmong family, her paternal grandparents were from the Xiong clan, but changed their last name to Song when the family immigrated to the United States. Her parents were met as adults in Sacramento, her father works as her mother is a homemaker. She has two younger brothers and Nathan; when she was six years old, Song moved with her mother to Los Angeles, California, to support her acting career. As a young girl, Song wanted to do ballet.

She said, ``. Although Song cried all the way through her first class, she now holds a black belt in taekwondo. Song was named an All-American Scholar in the ninth grade, she was homeschooled and earned a high school diploma at age 16 took courses at a community college. She graduated from the University of California, Berkeley in 2009, majoring in psychology and minoring in business. Song began in show business as a child fashion model in San Francisco after being spotted in a shopping mall by an agent from a modeling school, she began acting at the age of five or six in a Little Caesars commercial, a Barbie commercial. Her first film role was in an AFI student short film by actress Elizabeth Sung. "She came in confident. She was focused, it was obvious that she loved what she was doing," said Sung; the film is about a waitress/dancer named Fong who remembers her loving brother and their bittersweet childhood in Hong Kong. The seven-year-old Song played a young version of "Fong", portrayed as an adult by Tamlyn Tomita.

The film won a CINE Golden Eagle award. She appeared in another short film directed by Elizabeth Sung called The White Fox. Song appeared in two episodes of the television program Thunder Alley, was a regular in the children's television series Fudge, in which she portrayed Jenny, her theatrical film debut was in Santa with Muscles, a 1996 independent film starring professional wrestler Hulk Hogan. After a small role in Leave It to Beaver, she appeared in the Nickelodeon television series 100 Deeds for Eddie McDowd, where she played Sariffa Chung in thirteen episodes. After 100 Deeds, she had a number of small parts in television shows such as 7th Heaven, Judging Amy, ER, Once and Again, The Brothers García, Bette, The Bernie Mac Show, The Nightmare Room, For the People and George Lopez. Two of Song's early roles led to recognition in the Young Artist Awards, her role in the 2000 Disney Channel Original Movie, The Ultimate Christmas Present, won her the award for "Best Performance in a TV Movie Comedy, Supporting Young Actress".

The film centers on two teenage girls, Allison Thompson and Samantha Kwan, who find a weather machine and make it snow in Los Angeles. Her 2002 appearance on The Bernie Mac Show led to her nomination for "Best Performance in a TV Comedy Series, Guest Starring Young Actress". In the same year, she was in the 20th Century Fox family film Like Mike, which grossed over $60 million; the film stars rapper Bow Wow as an orphan who can play NBA-level basketball. Song portrays the character a thirteen-year-old orphan. Although the film was criticized for its "frightening myths about adoption", it was successful enough to spawn a sequel. Song did not participate in the sequel. In 2002, Song appeared in the Disney Channel movie Get a Clue. After 2002, Song continued to make guest appearances in American situation comedies such as That's So Raven and One on One, she had a recurring role as Tia in the Disney Channel series Phil of the Future, appearing in seven episodes of the series in 2004 and 2005. In late 2004, Song starred in the Disney Channel Original Movie Stuck in the Suburbs, portraying Natasha Kwon-Schwartz.

The television premiere received 3.7 million viewers. The film is about two teenage girls living in suburbia who accidentally exchange cell ph