Recent content by gpsimms

Thank you all for the help so far. I have tried to take my data and calculate #moles HCl by using both pH and conductance. The answers disagree significantly, so I think I must be doing something wrong, and would like to check. For one case, my final pH is 1.66, and my final conductance is...

Hi y'all, I think this is my first time in the chemistry section of this forum, so thank you in advance for your patience with what is (I'm pretty sure) an elementary question. I've googled around for this a bit, but my last acid chemistry study was in 2002 or so, so the reading I am doing is...

Ah, yes, actually. There is a dimmer on a different light on the same breaker switch. Is it possible that could be the problem?

Yeah. I removed the ballast from the fixture entirely. I bought "bypass" led bulbs. The pins on one end are labelled "L" and "N" and the pins on the other end are not labelled. I connected the black wire from the ceiling in parallel to the 4 line pins and the white wire in parallel to the 4...

Thanks everyone for the advice. I had already purchased the ballast, so gave it a go, and the lights worked fine. But... The old ballast housing did not fit over the new ballast, and I got frustrated and decided to try the LED suggestion. Wiring up the LEDs to bypass the ballast entirely...

Ok very much amateur here, appreciate any advice. So, the guy at home depot suggested the ballast was the reason my flourescent kitchen light goes out occasionally. The light worked well for the first 3 years of ownership. Now, it doesn't buzz or flicker, it just occasionally doesn't work...

Yup. After sleeping on it, I felt pretty correct about what I had written. But it is nice to have had someone else look it over. Thank you for your time! Go Blue! '06 School of Education

Hi there, Hopefully this is a very easy question and you all can just confirm this for me. When calculating heat transfer into a fluid from a heated tube, is it correct to say that the heat transfer coefficient is *not* dependent on the tube diameter? So, if we solve for T_{out}, we get...

I'd be lying if I said I hadn't considered the stay-at-home-dad route. And, for the record, I don't feel particularly emasculated by it. I think staying home with children could be really rewarding. However, I don't think it's accurate to say staying at home maximizes income. I am aware of the...

Thanks for the feedback! I definitely think part of the appeal of this position is the 'take it as I go' aspect. For example, I plan on spending time this year teaching and also applying for research and industry jobs. I don't really have any decisions to make until/unless I get a job offer from...

Hi there, TL/DR - I have a community college job with a sufficient salary. Should I be happy with that + freetime or should I try to get a job which really uses my PhD? If I go with happy freetime option, are any of the projects I propose interesting AND feasible? If I am too lazy to follow...

Oops! I just saw the link that you included in your response. It looks helpful and I will do a detailed read of it this evening.

Thank you again for the insight/discussion! It's appreciated and very helpful. This would be nice. I doubt that I can control pressure very precisely. The best I could do would be to attach a precision needle valve someplace to the chamber and adjust the valve to regulate pressure. This...

Thanks for the quick reply! To answer your questions: 1.) It is best for the flow to undergo supersonic expansion. The chamber between the nozzle and the skimmer will be held at approximately 0.5 torr. As such, molecular collisions can cause the beam intensity to drop. If, instead, there is...

Hi y'all, thanks in advance to anyone who knows a bit more about compressible/isentropic flow than me for the help, I have an interesting problem which I've been working on for a bit. Basically, I would like to measure species coming out of a reactor using molecular beam mass spectrometry...