Australia's Science Forum

Expensive little exercise. If you have any others smeer Silicon grease round either end of taper.
If buying new voltameters, you will find they have teflon taps this solve problem
cheers!

Investigating on web found it is made with motor oil I tried kneading it with some parrafin oil and it became smooth again not crumblly!
Sorry I've got to get back to Pl opps working with my plasterscine

Does anyone know what oil they use in plastercine, my big blocks were hard so put fanheater on to soften Then I got Side-tracked a lot of oil came out now I wish to rejuvenate and wondering what oil to use to soften?

Just checking out past polls, and most have beenin job 10 Years+, I'm prepared to bet most are baby boomers along with most of the teachers in my school, and I wonder what's going to happen in 10 years time

If you decide to buy multimeters I have found best prices are at Jaycar od Dick Smith but remember to get overload protected or the kids will blow them also be aware that some have to be turned off or they flatten battery, others turn themselves off after 5 min with no reading when measuring high cu...

The rubber pipette fillers perish because kids suck chemicals up into bulb.
Every time they come back from class room make sure that you dry them out and don't leave them squeesed in, also I have a piece of 4mm rod that I can push the small glass marble into correct position

The best methord is have the teacher check the kids circuit before they are allowed to turn on! Replace the meters with digital multimeters that are overload protected but this can be a problem sometimes when values are not steady, you can see a needle pointer wavering but the digital meter will not...

You already realise most of our glass is non-recyclable (Pyrex) and that that is not would be contaminated.
I prise open sharpes container empty into old photocopy paper box when full put on lid tape well and place in industrial waste bin at back of school

Hi Loopy
NSW TAFE run a SLACS course ( Thats Science Lab Attendants Course)
It 's possible they would do it by correspondance with you attending a bloc for practical sessions
If you get no joy from your local TAFE contact Robyn Kraniac at Newcastle Tafe[/b]

A Happy Safe holiday to all NSW'ites

Thanks! Mother (Hee Hee)
But it gives me a starting point

I find there is always a backlog of washing glassware to prevent thios problem

I have some burettes with teflon taps with the brand nane Scherf (W Germany). They were purchased by previous Labbie, Can anyone tell me the agent to buy replacement parts
Thanks Ocker

Hey robb
you forgot to mention that you obtain erichrome black T as a black powder
than dissolve 2g in 150ml of Ammonia solution than add 50ml of ethanol.

When they want protein for bio pract tests, I buy the plastic eggs from supermarket for making pavlovers, its just powdered egg white. Cheers Hope this helps
Cheers

Brilliant Robb!
Thanks
By the way what are you doing in dead end job like this?
I'm in semi-retirement, Kids left home and every time I think I should go and get a real job, I think 30 Hrs/week 40 W/Yr Year it's OK

Hey Fella's
Look at the cost of a crucible + the dangers involved, they are a disposable item, just scrub out and for badly stained ones break up for "porous pot"
Cheers

Yes Karen
The New Disks still have DET format But I can't comment on what chemicals you are looking for

Hey Robb
Did I miss something or did your link not come through

The element is made of Nichrome that normal lead solder will not bond to, but you can buy a soft silver solder and special flux that will work.
I think this would be uneconomical if only using once.
Otherwise see if you can find a crimp lug that will clamp element to terminal post.