Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

If scientist have made small particles of matter then why do we still haw the law of conservation of matter? Is it because the few particles don't make a noticeable difference in our life?

share|improve this question

1 Answer 1

up vote 3 down vote accepted

For one thing, you're probably thinking of the law of conservation of mass. Calling it "conservation of matter" is technically inaccurate because matter isn't a quantitative property of a physical system, and only such properties have conservation laws.

Now with that detail out of the way: there isn't really a law of conservation of mass, either. But you can have an effective law of mass conservation, if you can safely ignore any processes that convert particles with one mass to particles of a different mass. In daily life, we can always do that, because the kinds of processes that involve particles of different masses just don't occur under normal (for us) conditions. But if you're dealing with high-energy particles, there are lots of processes where the masses of the inputs and outputs differ. That's how we can create bits of matter, by taking advantage of those processes.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.