[MSL]

Topic about the laws

  To be about the different laws like the law of conservation of energy, the law of conservation of mass, the law of demand, etc.

[MSL]

Law of conservation of energy

  Let's start with this law (the law of conservation of energy). "In physics, the law of conservation of energy states that the total energy of an isolated system cannot change—it is said to be conserved over time. Energy can be neither created nor destroyed, but can change form, for instance chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite."^{http://en.wikipedia.org/wiki/Conservation_of_energy http://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_License} Easy, isn't it?

[SEO]

The law of conservation of mass

  I'll continue with the law of conservation of mass. Here it is:

The law of conservation of mass, or principle of mass conservation, states that for any system closed to all transfers of matter and energy (both of which have mass), the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed. Hence, the quantity of mass is "conserved" over time. The law implies that mass can neither be created nor destroyed, although it may be rearranged in space, or the entities associated with it may be changed in form, as for example when light or physical work is transformed into particles that contribute the same mass to the system as the light or work had contributed. The law implies (requires) that during any chemical reaction, nuclear reaction, or radioactive decay in an isolated system, the total mass of the reactants or starting materials must be equal to the mass of the products.

^{http://en.wikipedia.org/wiki/Conservation_of_mass http://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_License}
 I understood it.