Recent content by sari

I'm studying physics, math and some chemistry at the OU in Israel. I don't know about the UK - here they have the basic selection of courses most people take in undergrad (QM, E&M, statistical, solid state, waves, nuclear, etc). I find it much harder than studying at a regular university...

Thanks! Are any of those free?

For example, I would like to visualize the transformation u=cot-1(1/α y/x) v=αx2+y2/α

After thinking about it more, I actually found that the molar fraction does depend on the temperature (funny, because another online source mislead me by stating that it does not depend on the temperature). If you know the initial composition, the enthalpies of evaporation for each substance...

Why does the molar fraction of a solution not depend on temperature? In other words, why will heating a solution preserve its composition? It seems to me that if I have two substances that evaporate at different rates, the substance with the faster evaporation rate will pass more moles into...

I guess you could try to find two different series approaching 0 for which the function approaches different values. I'm going to try that approach...

Oh, wait - I'm still stuck! Obviously, lim x^p*sin(1/x) = 0 at 0, because sin(1/x) is bounded between +-1. But what do you do when you have a case like x^p*1/sin(1/x) ? Squeeze theorem doesn't seem to work here.

dynamicsolo - thanks for the help! Didn't notice your answer before I finished my post!

Right - that's exactly the situation in my problem. lim g = 0, lim f doesn't exist. Specifically, I'm trying to determine whether x^2* (1/sin(1/x)) has a limit at 0. 1/sin(1/x) oscillates around between +-infinity in the neighborhood of 0, so it clearly has no limit. However the limit of...

Homework Statement If it is known that f has no limit (finite or infinite) at x, does the limit if f*g at x exist? (g being any continuous function). if not - how do you prove it?

Thanks for all the tips!

How to get "Aha" moments in the middle of math exams? I find that when I work on math homework, I usually spend hours (or days) on a single problem, with little success. I usually go around in circles, and end up frustrated and clueless, with a huge mess of scribbled paper in front of me. Then...

Israel. Everyone pays a certain minimum for health insurance by law (there are several national clinics from which to choose, but they all have to provide certain services), which covers a wide and diverse range of health services. You can pay more if you want more extensive services (including...

At least from reading the Wikipedia, it seems that the reasons for closing most of the plants you mentioned were mainly because of the political influence of the protesters (who were paranoid about anything nuclear). Or in the case of Rokkasho, because it was found to be built on a geological...

Thanks for all the replies - I'll check out those links now!