Australia's Science Forum

I always thought Science assist was called chemtalk

It is also anaesthetic, for when mongrels get you down!

Emmer Chisit, I want to get one of those, for myself to play with blow the school Cool!

Good one Smiley!
Glad to see you are in top form!

Look up Young's modulus on wikipedia Very comprehencive
Also look up Houndsfield test

Youngs Modulus= stress/strain by supporting and putting weights on and measure the expansion

I went to a training day on Friday, on the new Chemwatch. Good in the morning but the afternoon, I think she (Anna) was playing catchup and left us floundering this included Credo when sussed it could be good. The old chestnut came up, "Why can't we have subscript No's" and response was &q...

Hey Sunray! You know they can't bitch about you when your there to defend yourself, that would make them look silly

Just add a drop of 0.1M sodium hydroxide shake, repeat till green
I think it absourbs CO2 fromthe air that forms carbonic acid

Try Ammonium Hydroxide

What the ****

I have been asked to post this reply from Chemwatch Re Chemwatch GHS labels:posts Answer to sunray post of June 4th .If there are phrases, elements that are not necessary or doesn't fit their need, they can edit this from DGEN According to Code of Practice of Workplace Hazardous Chemicals, all of th...

Get a hard backed razor blade and scrape each side of pop stick as most have a wax coating that stops the solution absorbing
Yes! the more concreated solution the better although when I've done it this way usually grabbed 1M solution off shelf

The others have better quality smoothing, but nothing wrong with it.

Everything is working OK!
It's possible for the output to be up to 16V on 12v setting with no load
It's a function of the smoothing capacitors in the output the value is 12v RMS (root mean squared) ( 0.707 of peak) but it's possible to go up to peak value

It should drift back towards 7 but will always have a memory of last reading
Make sure it's washed well and returned to 7 before measuring distilled water

It's possible that you got the wrong jet in them!
Get one of your old burners and see if jet is interchangable and try one with old jet and see if that works

Now the voltage output is only a rough indication because it changes with the load you put on it.
Give me a word picture or make and I'll answer some of your questions

Also get the teacher to have kids reverse the polarity while doing the prac and the copper plates off back to coppor electrode
Its powdery and just wipes off the copper electrode