--%>
Assignment Help - homework help

Conservation laws and illustrations of conservation laws

Explain Conservation laws and illustrations of conservation laws (Conservation of mass-energy, electric charge, linear momentum and angular momentum) ?

Conservation laws: The law which states that, in a closed system, the net quantity of something will not raise or reduce however remains exactly similar; that is, its rate of change is 0. For physical quantities, it defines that something can neither be formed nor destroyed. Mathematically, when a scalar X is the quantity considered, then

dX/dt = 0,
Or, consistently,
X = constant.

For a vector field F, the conservation law can be written as:
div F = 0;

i.e., the vector field F is divergence-free everywhere (that is, has no sources or sinks).

Some of the specific illustrations of conservation laws are:

Conservation of mass-energy: The net mass-energy of a closed system stays constant.

Conservation of electric charge: The net electric charge of a closed system stays constant.

Conservation of linear momentum: The net linear momentum of a closed system stays constant.

Conservation of angular momentum: The net angular momentum of a closed system stays constant.

There are numerous other laws which deal with particle physics, such as conservation of baryon number, of strangeness, and so forth, that is conserved in some basic interactions (like the electromagnetic interaction) however not others (like the weak interaction).

   Related Questions in Physics

  • Q : What is Farad or SI unit of capacitance

    What is Farad or SI unit of capacitance? Farad: F (after M. Faraday, 1791-1867): The derived SI unit of the capacitance stated as the capacitance in a capacitor that, when charged to 1 C, contains

    		•
  • Q : Define Ergosphere Ergosphere: The area

    Ergosphere: The area around a rotating black hole, among the event horizon and the static limit, where the rotational energy can be removed from the black hole.

    		•
  • Q : Law of Lamberts Cosine State the law of

    State the law of Lamberts Cosine? Describe briefly?

    		•
  • Q : Explain Correspondence limit or

    Explain Correspondence limit or Correspondence principle? Correspondence limit (N. Bohr): The limit at which a more common theory decreases to a more specialized theory when the situations that the

    		•
  • Q : Define Doppler Effect Doppler Effect

    Doppler Effect (C.J. Doppler): The waves emitted by a moving object as received by an observer will be blue shifted (compressed) when approaching, redshifted (that is, elongated) if receding. This takes place both in sound and also el

    		•
  • Q : Define Trojan points Trojan points : L4

    Trojan points: L4 and L5 are the two dynamically stable Lagrange points (that is, beneath certain conditions).

    		•
  • Q : Define Charles law Charles' law (J.A.C.

    Charles' law (J.A.C. Charles; c. 1787): The volume of an ideal gas at constant (steady) pressure is proportional to the thermodynamic temperature of that gas.

    		•
  • Q : Define Joule-Thomson effect or

    Joule-Thomson effect: Joule-Kelvin effect (J.P. Joule, W. Thomson [later Lord Kelvin]): The change in temperature which takes place whenever a gas expands into an area of lower pressure.

    		•
  • Q : Define Steradian or SI unit of solid

    Steradian: sr: The supplementary SI unit of solid angle stated as the solid central angle of a sphere which encloses a surface on the sphere equivalent to the square of the sphere's radius.

    		•
  • Q : Acceleration during this interval The

    The velocity of a body was observed to be constant throughout five minutes of its motion. Determine its acceleration during this interval?

    		•