Australia's Science Forum

Hi Maria C, All types of glass that we are subject to in Science will melt even the Borosilicate type is heated strongly and long enough. To fire polish (without tating the obvious) will need the burner on the Blue flame and approx 2cm from the inner lightblue cooler cone. This will give you good re...

Hi All,

All the very best to you and your families for Christmas and a safe new year.

Cheers,

Robb.....

Hi All, Rather not how fast the universe is but how fast is it expanding, My question is this.. If the universe is expanding then E=Mc2 cannot be true.. Answer, Yes it is although we have to look at this as being relative to the space and time of which the universe is currently at. Basic Laws of The...

Hi All, Used Americium 241 that is passed its halflife will begin to have will have counts less than 100 Bq's. This being an alpha partical releaser, this should not be a problem. Physics or main stream science will use these isotopes anyway, so keep hold onto them. Uranyl Acetate on the other hand ...

Hi All,

A good thing to do (particularly with Copper Sulfate) and that is to filter the used Copper Sulfate and label this "for Crystalisation Only" for this type of Prac there is no need for purity and this can be used again and again.

Cheers,

Robb.....

Hi All, Good question, I have two answers to this a relative answer and a more philosophical answer, both of which you will find either funny or mind blowing.. 1. How long is a piece of string... double the length from one side to the middle. 2. My answer to the other question is this.... A piece of...

Hi All, For those people heading to St Mary's, please say hi to all for me. Unfortunately Uni finished late and I had time off for exams, the school has frowned upon any chance/s I have/had in procuring a place at St Mary's. All the very best during your time, Let me know how it all goes, (with grea...

Hi All, Just keep in mind that all Ion Selcetive Electrodes, (Oxygen Fluoride etc will always be very sensitive). Ion Selective Electrodes (ISE's for short) require permiation of agressive ions wich send current throught the probe to the detector eg Data logger or other interface. All ISE's will be ...

Hi All,

Very much so Lada, just tired after a very busy year, mentally exhausted.

4 weeks to go as we break up on the 19 Dec.

Cheers,

Robb.....

Hi All, I am going to inject myself into the posts here for a few things. Standard Laboratory Temperature is 20 Degrees C, this is for Research and Development purposes so that reactions can take place and become standardised. in the school system we cannot control these very well over long duration...

Hi All,

I have now finished my exam period, so I will spend more time on Chmtalk.

(Looking forward to Christmas Break as my head is done in).

Cheers,

Robb.....

Hi All,

ALL I AM GOING TO SAY IS - See it from my point of view..

Cheers,

Robb.....

Hi All, Most people have hit the nail on the head, (It is great to see) the storage of Chemicals can be a huge thing for some people. The storage of Chemicals should be in segregated by its Dangerous Good Class, eg Corrosive, Toxic, Dangerour when wet. And within these classes each chemical should b...

Hi All, There is no regulatory amounts of Mercury a particular School may have. Typical pack sizes from chemicla suppliers are usually 100g or more. I have seen 1kg to 5 kg pack sizes. Mercury thermometers can be purchase at your own discretion, although I have 90% of our thermometers being a white ...

Hi All,

Just for everyone information, I have reached my examination period once again. You will have noticed that I have not posted on Chemtalk for a while. As soon as this exam period is finished I will post again, also to include the space topics. Stay tunned as time tell.

Cheers,

Robb.....

Hi Guy's,

Ihave logged onto the DET web portal and I have been able to access the Chemtalk web page without any issue,

Hmmmm..

Cheers,

Robb.....

Hi All, Red Phosphorus is hydroscopic as will absorb any mosisture it can get its hands on. It will pull a fair bit out of the air when you release the lid to atmospheric conditions. It will never be dry but this also protects it from becoming too dry and possibly Spontaneously Combusting. Cheers, R...

Hi All,

My deepest regrets also...

cheers,

Robb.....

Hi All, Laser Pointers can be a confusing issue for some, mainly because what type, who uses it and how it is going to be used. I purchased my personal Crystal Laser, Very Powerful and we sometimes use this here in our physics classes. Just to re-iterate what Richard said, that its fine considering ...

Hi Richard,

Its good to see the water rocket was a success, to refine it and tweek it to your specs is the pinacle of rocketry. You need to come over and see the solid fuel rockets here though...

Cheers,

Robb.....