- published: 27 Jul 2010
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A noun (from Latin nōmen, literally meaning "name") is a word that functions as the name of some specific thing or set of things, such as living creatures, objects, places, actions, qualities, states of existence, or ideas.Linguistically, a noun is a member of a large, open part of speech whose members can occur as the main word in the subject of a clause, the object of a verb, or the object of a preposition.
Lexical categories (parts of speech) are defined in terms of the ways in which their members combine with other kinds of expressions. The syntactic rules for nouns differ from language to language. In English, nouns are those words which can occur with articles and attributive adjectives and can function as the head of a noun phrase.
Word classes (parts of speech) were described by Sanskrit grammarians from at least the 5th century BC. In Yāska's Nirukta, the noun (nāma) is one of the four main categories of words defined.
The Ancient Greek equivalent was ónoma (ὄνομα), referred to by Plato in the Cratylus dialog, and later listed as one of the eight parts of speech in The Art of Grammar, attributed to Dionysius Thrax (2nd century BC). The term used in Latin grammar was nōmen. All of these terms for "noun" were also words meaning "name". The English word noun is derived from the Latin term, through the Anglo-Norman noun.
Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with the aim of providing a free, world-class education for anyone, anywhere. The organization produces short lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world. The main language of the website is English, but the content is also available in other languages.
The founder of the organization, Salman Khan, was born in New Orleans, Louisiana, United States to immigrant parents from Bangladesh and India. After earning three degrees from the Massachusetts Institute of Technology (a BS in mathematics, a BS in electrical engineering and computer science, and an MEng in electrical engineering and computer science), he pursued an MBA from Harvard Business School.
In late 2004, Khan began tutoring his cousin Nadia who needed help with math using Yahoo!'s Doodle notepad.When other relatives and friends sought similar help, he decided that it would be more practical to distribute the tutorials on YouTube. The videos' popularity and the testimonials of appreciative students prompted Khan to quit his job in finance as a hedge fund analyst at Connective Capital Management in 2009, and focus on the tutorials (then released under the moniker "Khan Academy") full-time.
Organic chemistry is a chemistry subdiscipline involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms. Study of structure includes many physical and chemical methods to determine the chemical composition and the chemical constitution of organic compounds and materials. Study of properties includes both physical properties and chemical properties, and uses similar methods as well as methods to evaluate chemical reactivity, with the aim to understand the behavior of the organic matter in its pure form (when possible), but also in solutions, mixtures, and fabricated forms. The study of organic reactions includes probing their scope through use in preparation of target compounds (e.g., natural products, drugs, polymers, etc.) by chemical synthesis, as well as the focused study of the reactivities of individual organic molecules, both in the laboratory and via theoretical (in silico) study.
The Indian Institutes of Technology Joint Entrance Examination (IIT-JEE) was an annual engineering college entrance examination in India. It was used as the sole admission test by the 16 Indian Institutes of Technology (IITs) and Indian School of Mines Dhanbad (to be converted into IIT). The examination was organised each year by one of the various IITs, on a round robin rotation pattern. It had a very low admission rate (about 10,000 in 500,000 in 2011), and was thus recognised as one of the toughest examinations in the world.
In 2013 it was replaced by the two-phase Joint Entrance Examination.
The first IIT, IIT Kharagpur, started in 1951. In the initial few years (1951-1954) students were admitted on the basis of their academic results followed by an Interview in several Centers across the country. From 1955-1959 admission was via an all India examination held only for IIT Kharagpur (other IITs had not started by then). Branches were allotted through Interviews/counselling held at Kharagpur.
An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of secondary education or higher learning, research, or honorary membership. The name traces back to Plato's school of philosophy, founded approximately 385 BC at Akademia, a sanctuary of Athena, the goddess of wisdom and skill, north of Athens, Greece.
Before Akademia was a school, and even before Cimon enclosed its precincts with a wall, it contained a sacred grove of olive trees dedicated to Athena, the goddess of wisdom, outside the city walls of ancient Athens. The archaic name for the site was Hekademia, which by classical times evolved into Akademia and was explained, at least as early as the beginning of the 6th century BC, by linking it to an Athenian hero, a legendary "Akademos". The site of Akademia was sacred to Athena and other immortals.
Plato's immediate successors as "scholarch" of Akademia were Speusippus (347–339 BC), Xenocrates (339–314 BC), Polemon (314–269 BC), Crates (ca. 269–266 BC), and Arcesilaus (ca. 266–240 BC). Later scholarchs include Lacydes of Cyrene, Carneades, Clitomachus, and Philo of Larissa ("the last undisputed head of the Academy"). Other notable members of Akademia include Aristotle, Heraclides Ponticus, Eudoxus of Cnidus, Philip of Opus, Crantor, and Antiochus of Ascalon.
Introduction to chirality (handedness), and how chirality is related to the groups bonded to a central carbon. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/v/chiral-examples-1?utm_source=YT&utm;_medium=Desc&utm;_campaign=organicchemistry Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like buildin...
Chiral examples 1. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/v/chiral-examples-2?utm_source=YT&utm;_medium=Desc&utm;_campaign=organicchemistry Missed the previous lesson? https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/v/introduction-to-chirality?utm_source=YT&utm;_medium=Desc&utm;_campaign=organicchemistry Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how t...
Introduction to Stereochemistry from Chiral Carbons to Non-superimposable Enantiomers and more by http://Leah4sci.com/chirality This video gives you a proper introduction to chirality and stereochemistry in organic chemistry. Understand what chirality or 'handedness' is all about. Learn how to recognize chiral carbons, and how to identify achiral superimposable molecules vs non-superimposable enantiomers and more. Struggling with Organic chemistry? Grab my free ebook '10 Secrets To Acing Organic Chemistry' http://leah4sci.com/orgo-ebook/ I recommend following along with a model kit. Get the kit I'm using in the video through my Amazon referral link: http://leah4sci.com/kit (I get a small commission if you purchase through this link) This is Video 1 in the Chirality/steroechemistry seri...
This video shows you how to the distinguish chiral and achiral molecules using a line of symmetry test.
The difference between chiral and achiral, using human hands as an example. Created by Jay. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/v/stereoisomer-enantiomer-jay?utm_source=YT&utm;_medium=Desc&utm;_campaign=organicchemistry Missed the previous lesson? https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/chirality-r-s-system/v/chiral-examples-2?utm_source=YT&utm;_medium=Desc&utm;_campaign=organicchemistry Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical method...
Improve your understanding of molecular properties with this lesson on the fascinating property of chirality. Your hands are the secret to understanding the strange similarity between two molecules that look almost exactly alike, but are not perfect mirror images. Lesson by Michael Evans, animation by Safwat Saleem and Qa'ed Tung.
CD VERSION is right here: http://bit.ly/1O1GBcH Download at: http://bit.ly/2eAsxc4 Website: http://bit.ly/1hYkbvk Store: http://bit.ly/1ixtfb1 Night Sky was recorded between April and December 2014. Additional recordings between February and May 2015, at WeakLight Studio, Piacenza, Italy. ____ Tracklist: 1. My Temple of Isolation 0:00 2. Nightside I: Everblack Fields 10:01 3. Nightside II: Sky Wonder 28:31 4. The Morning Passage 42:32 5. Beneath The Snow And The Fallen Leaves 45:56 ____ Biography: At the end of 2015, over the course of 2 demos, 2 split albums and a full-length, Chiral tries to transcend the foggy landscape of the North Italian lands with a new atmospheric/post-black metal approach. His compositions shine of a dim light dwelling through the branches, alternating so...
Snow//Heritage (2016) Tracklist: 0:00 Sage Moon (Woman Is The Earth Cover) 7:19 Now Her Weeping (Soil's Heritage I) 12:38 Nowhere The Kingdom Fell (Soil's Heritage II) 16:12 Whiteness (The Snow & The Borrowed Light) Store: http://chiral.bigcartel.com/ BandCamp: http://chiral27.bandcamp.com/album/snow-heritage Site: https://chiralitaly.wordpress.com/ FB: https://www.facebook.com/ChiralItaly
Gazing Light Eternity (2016) Tracklist: 0:00 Part I (The Gazer) 14:50 Part II (The Haze) 21:11 Part III (The Crown) 34:27 Part IV (The Hourglass) BandCamp: https://chiral27.bandcamp.com/album/gazing-light-eternity FB: https://www.facebook.com/ChiralItaly
IIT JEE Main and Advanced Chemistry Video Lectures and Study Material developed by highly experienced and dedicated faculty team of Rao IIT Academy. Visit http://www.raoiit.com or email studentcare@raoiit.com for any query or doubt related to your IIT JEE Preparation. Want to be the Topper ??? Learn Chiral Carbon & its Optical Activity from Rao IIT Academy. Prepare for your Boards and New IIT-JEE Pattern - JEE Main and JEE Advanced / MH-CET / BITSAT / VIT / SRM / Manipal and other Competitive Exams with Rao IIT Academy. -----------------Connect with us.... Subscribe to Rao IIT Academy YouTube channel - http://www.youtube.com/RaoIITAcademy Like us on Facebook - https://www.facebook.com/Raoiit Follow us on Twitter - https://twitter.com/rao_iit +1 on Google Plus - https://plus.google.com/+Ra...
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