Can you name some conservation laws of physics? (Linear, energy, momentum, etc...) and explain them to me?

Question

I have an exam tomorrow and my professor is going to state a problem about the conservation laws... i have in mind about momentum and stuff. Can anyone of you name some major ones? I would appreciate it. Best answer gets full credit.

Answer 1

law of conservation of ENERGY

this law states that the energy cannot be created nor destroyed.if u spent K units of energy then U cannot get total work + energy greater than k units.But no one knows what what energy exactly is, so how this law is formulated.
we measure total heat evolved + total work obtained and total heat given + total work done and both are found to be just equal.

law of conservation of momentum
force is mass X acceleration = mass X change in velocity per unit time.so we defined a quantity 'mass X velocity' and called it "momentum"now if no 'external force' acts on particle its velocity cannot be changed (deduced by newtons laws). so quantity 'mass X velocity' will also not change.
if some external force is acting on a particle then it will accelerate or deaccelerate so its velocity will change also at big speed changes the mass also vary comparably so the quantity 'mass X velocity' will also change.
That's why we say that " if no external force acts on a particle its momentum remains constant" which is statement of law of conservation of momentum.
similarly law of conservation of angular momentum is defined

law of conservation of CHARGE
IT states that the net charge in our universe is constant.we can create or destroy positive and negative charges in pairs only.

right now I can remember only these conservation laws but if u think of any other one in which U hav problem then tell that to me.I'll try to explain them

Answer 2

Many people know about conservation of energy, momentum etc. but there are also a load of other conservation laws, such as...

Conservation of angular momentum
Conservation of Center of Mass
Conservation of electric charge
Conservation of color charge
Conservation of probability
Conservation of mass (at low speeds)
Conservation of baryon number
Conservation of lepton number
Conservation of flavor
Conservation of parity

I haven't got time to explain all of them but the wikipedia link has more details. One law that isn't included is the "law of conservation of money"! I mean, it's all out there, I just don't seem to have much of it!

Answer 3

THE LAW OF CONSERVATION OF ENERGY:
Energy cannot be created nor deatroyed..it can only be converted to another form