Search found 46 matches
- 30 Oct 2007, 12:32
- Forum: Biology, Physics...
- Topic: Solar Power Question
- Replies: 6
- Views: 3195
Re: Solar Power Question
Hi You can get some very strange results with small cheap solar panels. One single panel is actually made up of a number of smaller silicon arrays, which in turn are all connected up in parallel to give you the required amperage at a certain voltage. What can happen is that the solder joints on chea...
- 21 Sep 2007, 14:44
- Forum: Miscellaneous
- Topic: A&D (AND) Electronic Balance
- Replies: 5
- Views: 2567
Re: A&D (AND) Electronic Balance
Thanks all
Looks like the company has changed name slightly, but the logo is the same. Will try them monday.
Kim
Looks like the company has changed name slightly, but the logo is the same. Will try them monday.
Kim
- 21 Sep 2007, 11:13
- Forum: Miscellaneous
- Topic: A&D (AND) Electronic Balance
- Replies: 5
- Views: 2567
A&D (AND) Electronic Balance
Does anyone know if the AND Company or Distributor is still in existance as I have an electronic balance from the company which requires repair.
Can anyone help?
Kim
Can anyone help?
Kim
- 20 Sep 2007, 14:44
- Forum: Chemistry and Labware - General
- Topic: Testing the "freshness" of acidified Potassium Dichromate
- Replies: 15
- Views: 5615
Re: Testing the "freshness" of acidified Potassium Dichromate
Further to Robbs comments if the colour is greenish it is old and useless.
Kim
Kim
- 20 Sep 2007, 14:35
- Forum: Miscellaneous
- Topic: Universe Practicals
- Replies: 1
- Views: 1307
Universe Practicals
Robb
Other than the Balloon prac for the Big Bang to explain the expansion of the universe are there any other pracs that you know, as the Teacher have been asking me, and for the life of me, I can't think of any other than PC based exercises.
Kim
Other than the Balloon prac for the Big Bang to explain the expansion of the universe are there any other pracs that you know, as the Teacher have been asking me, and for the life of me, I can't think of any other than PC based exercises.
Kim
- 07 Aug 2007, 14:36
- Forum: Sourcing Materials & Eq Repairs
- Topic: copper wire price rise
- Replies: 5
- Views: 3004
Re: copper wire price rise
Hi all
If you really want cheap copper wire, contact any electrician for all there scrape pieces and strip it out of the plastic. This is what I do. Its amazing how much you can find lying around, even after there've been at your school
Kim
If you really want cheap copper wire, contact any electrician for all there scrape pieces and strip it out of the plastic. This is what I do. Its amazing how much you can find lying around, even after there've been at your school
Kim
- 07 Aug 2007, 14:30
- Forum: Chemistry and Labware - General
- Topic: Ammonium nitrate
- Replies: 6
- Views: 3217
Re: Ammonium nitrate
Lorrae It was 6 mths ago, and I think it was from SSA. Schools are exempt from a Licence up to 3KGs, but I think you hit the answer, and that it is too much of a headache. Having said that universities and other reseach organisations only buy small amounts, so must be available. My answer would be c...
- 07 Aug 2007, 09:57
- Forum: Chemistry and Labware - General
- Topic: Ammonium nitrate
- Replies: 6
- Views: 3217
Re: Ammonium nitrate
Hi
you are able to purchase Ammonium Nitrate, but you can't hold more than 3kgs under the legistation before you MUST get a Licence. I've been able to buy it without any problems. I've had this out with the appropriate Authority at WorkCover.
Kim
you are able to purchase Ammonium Nitrate, but you can't hold more than 3kgs under the legistation before you MUST get a Licence. I've been able to buy it without any problems. I've had this out with the appropriate Authority at WorkCover.
Kim
- 06 Jun 2007, 12:55
- Forum: Chemistry and Labware - General
- Topic: Chemical suppliers
- Replies: 2
- Views: 1757
Chemical suppliers
Does anyone know if Chem-Supply will sell to us or we must go to a distributor as I'm after a chemical that my normal supplier can't supply, as its not a normal common chemical.
Kim
Kim
- 06 Jun 2007, 10:15
- Forum: Chemistry and Labware - General
- Topic: Eriochrome Black T
- Replies: 2
- Views: 1765
Re: Eriochrome Black T
Hi Make the indicator as follows: Eriochrome Black-T Indicator. Place 1 gram Eriochrome Black-T and 9 grams of hydroxylamine hydrochloride into a 250-ml glass stock bottle, add 200 ml of reagent grade alcohol, and mix until dissolved. Record the date the indicator is prepared and discard after 3 mon...
- 06 Jun 2007, 10:04
- Forum: Safety with Chemicals
- Topic: White Out (Liquid Paper) removal
- Replies: 7
- Views: 4753
Re: White Out (Liquid Paper) removal
Ethyl Acetate works well also
Kim
Kim
- 06 Jun 2007, 09:52
- Forum: Announcements
- Topic: Risk Assessment Sheets
- Replies: 10
- Views: 4843
Re: Risk Assessment Sheets
Hi
All Here is my Risk Assesment form I did for Teachers. Tried to make it a tick and flick style to make it easy for them.
Kim
All Here is my Risk Assesment form I did for Teachers. Tried to make it a tick and flick style to make it easy for them.
Kim
- 06 Jun 2007, 09:30
- Forum: Chemistry and Labware - General
- Topic: Simple Top Tip
- Replies: 2
- Views: 1893
Re: Simple Top Tip
Hi
Another adhesive remover (all types) is ethyl Acertate. Can be bought in a comercial spray can out side labs and cleaners use it a lot. I just use it straight from the bottle in the Lab.
Kim
Another adhesive remover (all types) is ethyl Acertate. Can be bought in a comercial spray can out side labs and cleaners use it a lot. I just use it straight from the bottle in the Lab.
Kim
- 06 Jun 2007, 09:21
- Forum: Announcements
- Topic: How do you get your Prac Request?
- Replies: 8
- Views: 4207
Re: How do you get your Prac Request?
Hi Like some of the others I insist on a form being filled at least 24hrs before hand, or it don't get done. The Teacher then have to do it themselves. I also provide an online request form recently which is getting great use as it can be emailed to me. Generally the Teachers all talk it through wit...
- 15 May 2007, 13:42
- Forum: Chemistry and Labware - General
- Topic: Record keeping
- Replies: 6
- Views: 3428
- 15 May 2007, 11:32
- Forum: The Polling Booth
- Topic: Who cleans the class rooms
- Replies: 19
- Views: 15884
Noona I do it on rare occasions, but I leave it where it is unless it is an expensive item. I make a big thing about it if it not returned to the preproom and the state of the classrooms is highlighted with the said Teacher. It up to the teacher to make sure the Science Prac rooms are tidy. I will c...
- 14 May 2007, 14:59
- Forum: Biology, Physics...
- Topic: Silicon piece
- Replies: 6
- Views: 3305
Wato If this is for the metals (conductors) and non-metals (insulators), just use a piece of glass rod or tube. Pure silicon is very expensive and most of the electronic industry sources have been doped with other metals to allow then to conduct under certain conditions, hence transistors and interg...
- 08 May 2007, 11:26
- Forum: Chemistry and Labware - General
- Topic: Inserting glass tubing into rubber bung
- Replies: 7
- Views: 3483
- 08 May 2007, 09:44
- Forum: Chemistry and Labware - General
- Topic: making delivery tubes
- Replies: 10
- Views: 4240
- 24 Apr 2007, 14:50
- Forum: Sourcing Materials & Eq Repairs
- Topic: Voltameter
- Replies: 4
- Views: 2536
Hi PhysicsOne Another method is to use hot and cold water from the sink taps over the tap body a few times then say after 3 time make sure you use hot as the last (boiling water on the last time just on the body only) then a gentle tap of the tap only (supporting the main body so as not to break it)...