I just know my daughter was our dependent the year she graduated from college because she lived with us until December, but she will not be this year (2012 taxes) since she has her own place. She is still on our health insurance until she's 26; however.
Answers. The law of conservation of matter states that in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant. The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.
Quick Answer. The law of conservation of momentum states that for two objects colliding in an isolated system, the total momentum before and after the collision is equal. This is because the momentum lost by one object is equal to the momentum gained by the other. Conservation of momentum is derived from Newton's laws of motion.