--%>
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 : How fireworks turn to shapes similar to

    Briefly illustrate how do fireworks turn to shapes similar to hearts and stars?

    		•
  • Q : Define Noether theorem Noether theorem

    Noether theorem (Noether): A theorem that explains that symmetries are what gives rise to conserved quantities. For example, the translational symmetry (that is the fact that the laws of physics work the same in all positions) gives r

    		•
  • Q : Steps to the scientific notation

    Illustrate the steps to the scientific notation? Briefly illustrate the steps.

    		•
  • Q : Define Olbers paradox Olbers' paradox

    Olbers' paradox (H. Olbers; 1826): If the Universe is infinite, consistent, and unchanging then the whole sky at night would be bright -- concerning as bright as the Sun. The further you stared out into space, the more stars there would be, and theref

    		•
  • Q : What is Causality principle Causality

    Causality principle: The principle which cause must always precede effect. More properly, when an event A ("the cause") somehow persuades an event B ("the effect") that take

    		•
  • Q : Explain Rayleigh-Jeans law

    Rayleigh-Jeans law: For a blackbody at the thermodynamic temperature T, the radiance R over a range of frequencies between the nu and nu + dnu is specified by: R = 2 pi nu2 k T/c2.<

    		•
  • Q : What is Cosmic censorship conjecture

    Cosmic censorship conjecture (R. Penrose, 1979): The conjecture, so far wholly undemonstrated in the context of general relativity, that all singularities (that is with the possible exception of the big bang singularity) are attended

    		•
  • Q : Define the term wave fronts What do you

    What do you mean by the term wave fronts? Explain in short.

    		•
  • Q : What is Reflection law Reflection law :

    Reflection law: For a wave-front intersecting a reflecting surface, the angle of incidence is equivalent to the angle of reflection, in the similar plane stated by the ray of incidence and the normal.

    		•
  • Q : Define Metre or SI unit of length Metre

    Metre: meter; m: The basic SI unit of length, stated as the length of the path traveled by light in vacuum throughout a period of 1/299 792 458 s.

    		•