Skip to main content

Home/ Groups/ Pedagogium
Jac Londe

CHART OF THE DAY: This Is Easily The Craziest Reason Why A Company Would Boost Its Divi... - 0 views

  • The Craziest Reason Why A Company Would Boost Its Dividend
  • Arguments for dividend growth typically emphasize 1) strong balance sheets and 2) track records of dividend growth.
  • how the senior management teams of the companies they are analyzing are variably compensated, as those with restricted stock and not options are much more likely to increase dividends. The principle? People rarely intentionally damage their own net worth. Absolutely fascinating.
Jac Londe

Energy of Photon | PVEducation - 0 views

  • Energy of Photon
  • A photon is characterized by either a wavelength, denoted by λ or equivalently an energy, denoted by E. There is an inverse relationship between the energy of a photon (E) and the wavelength of the light (λ) given by the equation:
Jac Londe

Joule - Wikipédia - 0 views

  • Le joule (symbole : J) est une unité dérivée du système international (SI) pour quantifier l'énergie, le travail et la quantité de chaleur[1]. Le joule étant une très petite quantité d'énergie par rapport à celles mises en jeu dans certains domaines, on utilise plutôt les kilojoules (kJ) en nutrition et dans les tableaux de valeur nutritive. Cette mesure est de plus en plus utilisée au côté des calories et tend graduellement à les remplacer.
  • Un joule est approximativement égal à : 6,24150636309.1018 eV (électronvolts) ;
  • Un joule vaut exactement : 107 ergs ; 1 pascal-mètre cube.
  • ...1 more annotation...
  • la calorie : 1 calorie = 4,1855 joules ; la thermie : 1 thermie = 4,1855 millions de joules. la thermie vaut 1 million de calories ; le kWh : 1 kWh = 3 600 000 J. Le kWh est l'énergie fournie par une puissance d'un kilowatt pendant une heure ; Le watt seconde : 1 Ws = 1 joule. Le kilogrammètre : 1 kilogrammètre = 9,80665 joules
Jac Londe

Greebo Science - 0 views

  • Planck Units
  • Planck units are largely based upon three fundamental units, h, G, and c.
  • The gravitational constant is given the symbol "G".   It is a measured value used in the force equation for gravity (see below). F = Gm1m2 / r2 The m units are masses of two bodies which are separated by a distance r.   By rearranging the equation, we have G (see below). G = Fr2 / m1m2 The gravitational force, F, was measured between two masses to arrive at G.   At various times, the laboratory equipment and methods were improved to arrive at more accurate values for G.   The physics texts were not usually updated for the new values because (1) the changes were not great enough to justify the added expense to the texts, and (2) the changes were happening frequently enough to make each text obsolete before it arrived in the hands of students.   Consequently, there are numerous variations of G to be found, but the differences between them are slight. There are many systems of weights and measures used in physics.   Fundamental constants such as G often have two values according to the measuring system used.   When two such units are mixed to arrive at subsidiary units such as the planck length, the result is a completely erroneous value along with units of measure which do not apply.   Consequently, it is important to convert the various units of the fundamental constants used to the same system of units.   In may instances of late, this has not been done. Finally, there is human error involved in copying from an old text to create a new next.   This means that it is wise to check various texts to see if they all agree (they usually don't), and decide what is correct and what is not correct.   For G, the following was discovered.
  • ...7 more annotations...
  • G = 6.670x10-11 newton meter2/kilogram2 From a text created by the Department of Physics at the U.S. Air Force Academy in about 1955, Formulas and Tables. G = 6.673x10-11 newton meter2/kilogram2 From a textbook last copyrighted in 1972, Elements of Physics. G = 6.6742x10-11 meter3/kilogram second2 From a science publication announcing an improved value based upon data from a recent experiment 1994.   Note that the the text mentioned below, probably written prior to 1994, did not include the change. G = 6.67259x10-11 newton meter2/kilogram2 From a textbook last copyrighted in 1997, Fundamentals of Physics Extended.  
  • 1 newton = 1 kilogram of force = 1 kilogram of mass x 1 meter/second2 = 100,000 dynes
  • For h, the following was discovered. h = 6.6252x10-34 joule second   or   4.134x10-15 electron volt second
  • 1 joule = 10,000,000 ergs = .737324 (one book gave .7376) foot pounds = 1 watt second = .1020 kilogram meter
  • The joule is defined as the unit of work or energy equivalent to work done or heat generated in one second by an electric current of one ampere against a resistance of one ohm - or raising the potential of a coulomb by one volt.
  • The erg is defined as the unit of work and of energy, being the work done in moving a body one centimeter against a force of one dyne. 1 erg = one centimeter dyne = 980.7 centimeter grams = 107 joules = 107 watt seconds The electron volt (sometimes called the equivalent volt) is defined as the unit of energy equal to that acquired by an electron passing through a potential of one volt.
  • h = 1.0753x10-35 kilogram meter2/second G = 6.6742x10-11 meter3/kilogram second2 c = 2.9979x108 meters/second
Jac Londe

Creative Destruction: GE's Brand New 100W Equivalent LED Bulb Illuminates the Future of... - 0 views

  • GE’s Brand New 100W Equivalent LED Bulb Illuminates the Future of Lighting May 7, 2012 Engineers at GE’s NELA Park in East Cleveland, Ohio, have spent a century building better light bulbs. When NELA opened in 1911, it became the world’s first industrial park, a distinction that earned it a place on the National Register of Historic Places. But now a new kind of history is taking place at NELA, the kind that will soon dispatch the incandescent light bulb down the same road traveled by the LP and the VCR. “This is an evolution,” says Glenn Kuenzler, a lighting engineer at NELA. He and his team of researchers are making sure that the GE bulb, whose legacy stretches back to Edison, is fit to survive.
Jac Londe

Fowl - 0 views

Jac Londe

VIDEO. Hollande s'adresse d'emblée au monde éducatif - Presidentielle 2012 - ... - 0 views

  • Jules Ferry
  • Dans le jardin des Tuileries, devant l'imposante statue de l'auteur des lois sur l'école «gratuite, laïque et obligatoire», le président a délivré «un message de confiance à l'Education nationale» et réservé ses «premiers mots de président de la République» à l'ensemble des personnels. Il a tenu à s'adresser «aux professeurs des écoles, aux enseignants du secondaire, aux universitaires, aux chercheurs» mais «aussi à tous les agents des plus modestes jusqu'aux plus prestigieux», soulignant que l'Ecole «attendait de la considération de la nation».
  • Sites du Groupe Amaury . Accueil   Widget RSS S'abonner : Web | Journal | Mobile | PDF .
Jac Londe

Force de Coriolis - Wikipédia - 0 views

  • La force de Coriolis est une force inertielle agissant perpendiculairement à la direction du mouvement d'un corps en déplacement dans un milieu (un référentiel) lui-même en rotation uniforme, tel que vu par un observateur partageant le même référentiel. Cette force est nommée ainsi en l'honneur de l'ingénieur français Gaspard-Gustave Coriolis. Elle n'est pas en fait une force au sens strict, soit l'action d'un corps sur un autre, mais plutôt une force fictive résultant du mouvement non linéaire du référentiel lui-même. C'est l'observateur qui change de position par l'action de l'accélération centripète du référentiel et qui interprète tout changement de direction de ce qui l'entoure comme une force inverse. L'introduction de cette force permet de simplifier les équations du mouvement dans ce genre de repère, au même titre que celui de la force centrifuge.
Jac Londe

La terre tourne à 1666 km/h ! - 0 views

La terre tourne sur elle même à la vitesse de 1666 kilomètres à l'heure. Oui, vous avez bien lu. Ce qui est en soi assez rapide par rapport à nos déplacements à 110 kilomètres à l'heure. Ce qui exp...

terre onde vitesse 1666

started by Jac Londe on 08 May 12 no follow-up yet
Jac Londe

iGoogle - 0 views

  •  
    http://j.mp/KOsDaQ Ceci est un  lien raccourci (shurl) vers  un site tiers. 
Jac Londe

HTML5 Web Storage - 0 views

  • HTML5 Web Storage
  • With HTML5, web pages can store data locally within the user's browser.
  • he data is stored i
  • ...1 more annotation...
  • localStorage - stores data with no expiration date sessionStorage - stores data for one session
Jac Londe

Journal of Insect Science - 0 views

  • The Journal of Insect Science is an international, open access, peer-reviewed journal publishing papers in all aspects of the biology of insects and other arthropods from the molecular to the ecological, and their agricultural and medical impact. Published online by the University of Wisconsin Libraries,
Jac Londe

Charest a perdu le contrôle, selon Khadir | Politique québécoise - 0 views

  • Québec solidaire a récemment proposé une solution qui ne requiert pas d'augmentation des frais de scolarité ni l'augmentation de la dette des étudiants ou l'impôt de la classe moyenne. Il s'agirait d'une taxe de 0,3 pour cent sur le capital des banques et autres entreprises financières qui permettraient de conserver les frais de scolarité au niveau actuel.
« First ‹ Previous 61 - 80 of 362 Next › Last »
Showing 20 items per page