Cumulative General Science/Technology Quiz

[uppi]

what is a fermion?

 

[Mise]

A particle with spin 1/2, and follows Fermi-Dirac statistics for energy states.

 

[uppi]

close, but not entirely correct.

 

[raketooy]

EDIT: Forget this message.

 

[brennan]

close, but not entirely correct.

Looked pretty good to me.

 

[Mise]

Hmm, maybe it's half-integer spin (i.e. spin 1/2 or 3/2 or 5/2 etc).

 

[uppi]

Hmm, maybe it's half-integer spin (i.e. spin 1/2 or 3/2 or 5/2 etc).

Yes. Spin 1/2 is the usual example, but all particles with half-integer spin are also fermions.

Your turn.

 

[Mise]

What is the main impurity in diamond that causes them to become coloured?

 

[brennan]

It's oxygen isn't it?

 

[Genocidicbunny]

Actually I think you're one off. According to my chemistry teacher ( hey, didnt say we couldnt ask other people ) its Nitrogen.

 

[Perfection]

I hope it's not urine

 

[Mise]

Actually I think you're one off. According to my chemistry teacher ( hey, didnt say we couldnt ask other people ) its Nitrogen.

Yup, it's Nitrogen. Ask away!

 

[Genocidicbunny]

Since it technically wasnt me who got the answer, Ill give the floor up again ( Plus I dont have a question to ask )

 

[Brighteye]

Here's an easy one:
Name a tissue in which I might find dendritic cells.

Person who says the tissue with the most gets the next question if I have multiple answers when I next check.

 

[peter grimes]

The Brain.

 

[dutchfire]

Perhaps the spine?

 

[ori]

if you ask for total cell numbers:
the mucosa and skin - if you ask for density probably spleen and lymph nodes

 

[Brighteye]

if you ask for total cell numbers:
the mucosa and skin - if you ask for density probably spleen and lymph nodes

You win. Mucosa or lymph nodes will do just fine.

 

[ori]

I am currently reading too much about the application of this method on proteins - so here is a bit of a Science trivia question:
For what did Sir Lawrence Bragg receive the Nobel Prize and (just for bonus points ) how old was he when he shared this prize with his father in 1915

 

[Mise]

Bragg's law of diffraction? X-ray diffraction... Crystal structures and the like...

As for age, my guess is....... 24!

P.S. Sorry for that completely incoherent brain-dump. I don't really remember what he did, and I only vaguely remember Bragg's law.