User Name
Password

Go Back   Planetarion Forums > Non Planetarion Discussions > General Discussions

Reply
Thread Tools Display Modes
Unread 15 Oct 2003, 15:12   #1
Ragnarak
Registered User
 
Ragnarak's Avatar
 
Join Date: Oct 2000
Posts: 4,944
Ragnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to behold
Chemistry question

Putting chemistry questions into a physics degree shouldn't be allowed, especially cos i remember **** all from A-Level


I need to figure out how much energy (in joules) is provided by "one barrel of oil". One barrel holds 0.159 metres cubed of oil.

We're meant to make lots of assumptions as the question is very vague and it's only an esitmation.

I assume i need the enthalpy of combustion of "oil" or something but like i said, i sucked at chemistry.

Any help would be cool.
__________________
I find it kind of funny
I find it kind of sad
The dreams in which i'm dying
Are the best i've ever had
Ragnarak is offline   Reply With Quote
Unread 15 Oct 2003, 15:15   #2
JonnyBGood
Banned
 
JonnyBGood's Avatar
 
Join Date: May 2001
Location: Further to the right
Posts: 19,441
JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Don't you get the density of oil and just use e=mc^2? I dunno though, maybe your course makes super duper meaningless and unnecessarily complicated questions.



Edit: And wouldn't provide mean you'd have to know the precise workings of whatever was transforming the energy from one state to another and the percentage efficiency and god but physics seriously sucks.
__________________
Some might ask what good is life without purpose but I'm anticipating a good lunch.
JonnyBGood is offline   Reply With Quote
Unread 15 Oct 2003, 15:16   #3
leknu
Ensign
 
Join Date: Nov 2000
Posts: 70
leknu is on a distinguished road
Re: Chemistry question

How about beeing annoying little git and just go with e=mc^2 which is quite likely not going to be considered as right answer, but is not exactly wrong either.

edit: duh, too slow
leknu is offline   Reply With Quote
Unread 15 Oct 2003, 15:48   #4
G_frog
Look over there!
 
Join Date: Feb 2001
Posts: 704
G_frog is an unknown quantity at this point
Re: Chemistry question

I think it's fair to say you will need to know how much energy is tied up in the chemical bonds (i.e. how much you get by burning it), not the amount in the mass.

So yes, you'll need the enthalpy of combustion. If you can't get it that simply you'll need the energy in the various types of bond involved (C-C, O=O and C=O primarily I assume) and the average size of hydrocarbons in whichever fraction of crude is shipped in barrels.
__________________
Do not argue with me! I control your arms!
G_frog is offline   Reply With Quote
Unread 15 Oct 2003, 15:52   #5
JonnyBGood
Banned
 
JonnyBGood's Avatar
 
Join Date: May 2001
Location: Further to the right
Posts: 19,441
JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by G_frog
So yes, you'll need the enthalpy of combustion. If you can't get it that simply you'll need the energy in the various types of bond involved (C-C, O=O and C=O primarily I assume) and the average size of hydrocarbons in whichever fraction of crude is shipped in barrels.

I find the fact you included the word simply in that statement downright hilarious.
__________________
Some might ask what good is life without purpose but I'm anticipating a good lunch.
JonnyBGood is offline   Reply With Quote
Unread 15 Oct 2003, 16:17   #6
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by JonnyBGood
Don't you get the density of oil and just use e=mc^2? I dunno though, maybe your course makes super duper meaningless and unnecessarily complicated questions.
I don't think 1/2 of the oil is antimatter.
MrL_JaKiri is offline   Reply With Quote
Unread 15 Oct 2003, 16:18   #7
JonnyBGood
Banned
 
JonnyBGood's Avatar
 
Join Date: May 2001
Location: Further to the right
Posts: 19,441
JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by MrL_JaKiri
I don't think 1/2 of the oil is antimatter.

That's what you get for not thinking I suppose.
__________________
Some might ask what good is life without purpose but I'm anticipating a good lunch.
JonnyBGood is offline   Reply With Quote
Unread 15 Oct 2003, 20:03   #8
Dace
so f*cking zen
 
Dace's Avatar
 
Join Date: Jan 2003
Location: Hitting Bottom
Posts: 8,499
Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

If i remember correctly (and im not sure i do) what you do is:

- Write out the formula for combustion (ie hydrocarbon to water and carbon dioxide etc).

- Show the energy break at each point.

- Work out the total anthalpy (might not be the right word) change for the single equation.

- Multiply by the total amount of moles or whatever of the hydrocarbon.



Something like that anyway (i *think*).
__________________
On a long enough timeline, the survival rate for everyone drops to zero.
Dace is offline   Reply With Quote
Unread 15 Oct 2003, 20:06   #9
Dace
so f*cking zen
 
Dace's Avatar
 
Join Date: Jan 2003
Location: Hitting Bottom
Posts: 8,499
Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dace has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Hmmmmm what G-frog said (i didnt realise he had).
__________________
On a long enough timeline, the survival rate for everyone drops to zero.
Dace is offline   Reply With Quote
Unread 15 Oct 2003, 20:07   #10
Ragnarak
Registered User
 
Ragnarak's Avatar
 
Join Date: Oct 2000
Posts: 4,944
Ragnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to beholdRagnarak is a splendid one to behold
Re: Chemistry question

Quote:
Originally Posted by Dace
Hmmmmm what G-frog said (i didnt realise he had).
heh ta
__________________
I find it kind of funny
I find it kind of sad
The dreams in which i'm dying
Are the best i've ever had
Ragnarak is offline   Reply With Quote
Unread 16 Oct 2003, 01:35   #11
alastair18
Registered User
 
Join Date: Jun 2001
Posts: 91
alastair18 is a jewel in the roughalastair18 is a jewel in the roughalastair18 is a jewel in the roughalastair18 is a jewel in the rough
Re: Chemistry question

I got asked a similar question at an interview. Because I didn't know any of the chemical bond strengths I could not get an answer that way. Instead I assumed the oil was basically the same as petrol and calculated how much work a car would do with it. It can only get you a rough answer but unless you just use the E=mc^2 forumla you won't have fully converted the oil into energy.
alastair18 is offline   Reply With Quote
Unread 16 Oct 2003, 09:30   #12
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by alastair18
It can only get you a rough answer but unless you just use the E=mc^2 forumla you won't have fully converted the oil into energy.
As I said, you're assuming that 50% of the oil is antimatter.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 09:57   #13
Cyp
∞+♪²
 
Join Date: Nov 2000
Location: :uo!te]o¯|
Posts: 428
Cyp is an unknown quantity at this point
Re: Chemistry question

Quote:
Originally Posted by MrL_JaKiri
I don't think 1/2 of the oil is antimatter.
I don't think 1/2 of the oil is oxygen, either. (Or however much oxygen would be needed.)
__________________
Structural Integrity for Creator - since he'll probably make PA turn 3D.
Wikipedia forum
Note to self - Don't write Chinese letters with bold and italics...
<!--Last incarnation: Nov 2000-->
Cyp is offline   Reply With Quote
Unread 16 Oct 2003, 09:59   #14
alastair18
Registered User
 
Join Date: Jun 2001
Posts: 91
alastair18 is a jewel in the roughalastair18 is a jewel in the roughalastair18 is a jewel in the roughalastair18 is a jewel in the rough
Re: Chemistry question

Quote:
Originally Posted by MrL_JaKiri
As I said, you're assuming that 50% of the oil is antimatter.
No, I just happen to have a complete barrel of anti-matter oil in my room. :tongue: When I mix them the two I will get a certain amount of energy out. Now you just need to halve this to get the amount of energy stored in the first barrel.

The question says nothing about the way you use the oil to create energy. If you burn the oil you require Oxygen but we don't have to assume that there is a high pressure pocket of oxygen in the barrel?
alastair18 is offline   Reply With Quote
Unread 16 Oct 2003, 10:05   #15
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by alastair18
No, I just happen to have a complete barrel of anti-matter oil in my room. :tongue: When I mix them the two I will get a certain amount of energy out. Now you just need to halve this to get the amount of energy stored in the first barrel.
Or have half of the oil made of antimatter, in other words?

You're also assuming several other things, but to have several orders of magnitude more antimatter than we've ever been able to produce is a tad silly.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 10:20   #16
Cyp
∞+♪²
 
Join Date: Nov 2000
Location: :uo!te]o¯|
Posts: 428
Cyp is an unknown quantity at this point
Re: Chemistry question

Quote:
Originally Posted by MrL_JaKiri
Or have half of the oil made of antimatter, in other words?

You're also assuming several other things, but to have several orders of magnitude more antimatter than we've ever been able to produce is a tad silly.
More or less silly than the original question, in its context?
__________________
Structural Integrity for Creator - since he'll probably make PA turn 3D.
Wikipedia forum
Note to self - Don't write Chinese letters with bold and italics...
<!--Last incarnation: Nov 2000-->
Cyp is offline   Reply With Quote
Unread 16 Oct 2003, 10:21   #17
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by Cyp
More or less silly than the original question, in its context?
You mean including a physics question in a physics course?
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 10:26   #18
Cyp
∞+♪²
 
Join Date: Nov 2000
Location: :uo!te]o¯|
Posts: 428
Cyp is an unknown quantity at this point
Re: Chemistry question

Quote:
Originally Posted by MrL_JaKiri
You mean including a physics question in a physics course?
I mean, that particular physics/chemistry question in a physics course.

Note that in physics classes, questions often involve things we can't build, such as infinitely long cylinders and stuff. So why not a bit of antimatter too..?
__________________
Structural Integrity for Creator - since he'll probably make PA turn 3D.
Wikipedia forum
Note to self - Don't write Chinese letters with bold and italics...
<!--Last incarnation: Nov 2000-->
Cyp is offline   Reply With Quote
Unread 16 Oct 2003, 22:09   #19
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

One barrel of oil contains the energy you can wrk out with e=mc^2. Even if half is not made of antimatter. However, unless half is made from antimatter you cannot access that energy....at least not without making a kickass invention which would abolish the need for oil (100% efficient matter-energy converion).

Its still there though. Use e=mc^2.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Unread 16 Oct 2003, 22:30   #20
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

No.

It says provided by, not exists.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 22:43   #21
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

Yes. Does it say "provided by when you burn the oil"? Nope. Does it say "provided by when you freeze the oil"? Nope.

Since it in no way specifies how the energy is provided, a complete matter-energy conversion is just as viable as any othr method of procuring energy from it.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Unread 16 Oct 2003, 22:46   #22
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by Bunga
Since it in no way specifies how the energy is provided, a complete matter-energy conversion is just as viable as any othr method of procuring energy from it.
VIABLE?

Since when was it viable to create half a drum of antimatter?

As you said yourself, you can't access that energy.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 22:51   #23
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

I didn't mean viable as in we being physically capable of extracting the energy. I meant viable in the hypothetical question. After all, we don't have that drum, do we? Its just hypothetical. We can't access the energy at all, since the drumdoesn't exist! Extracting "all" the energy is just a "bit more" hypthetical. So what?

The question, as is, is entirely ambiguous . Either answer is correct really.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Unread 16 Oct 2003, 22:53   #24
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Correct in the sense of being literally possible yes, but correct in the sense of nothavingyourmarkstakenawayforbeingasmartarse, no.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 22:56   #25
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

If an answer is technially correct, you get full marks. Sometimes you need more detail for it to be technically correct, but you still get the marks if you play it right.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Unread 16 Oct 2003, 22:57   #26
inf
Banned
 
Join Date: Dec 2000
Location: autogenic misery
Posts: 872
inf is an unknown quantity at this point
Re: Chemistry question

specify kinetic energy, then no energy at absolute zero.
inf is offline   Reply With Quote
Unread 16 Oct 2003, 22:59   #27
Proteus
Lord Denning
 
Proteus's Avatar
 
Join Date: Feb 2003
Location: City of London
Posts: 2,548
Proteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriend
Re: Chemistry question

Quote:
Originally Posted by Bunga
If an answer is technially correct, you get full marks. Sometimes you need more detail for it to be technically correct, but you still get the marks if you play it right.
No you don't. You get marks according to the mark scheme, and nothing else.

If a question said "Write everything you know about covalent bonds" and I wrote "I know nothing about covalent bonds" my answer would be technically correct, but i wouldn't get any marks.
__________________
Please bear in mind when reading the above post that I am always right.
Quote:
Originally Posted by Marilyn Manson
He was crowned in York Cathedral as 'Expert in the West' by Pope Urban III in 1186.
Proteus is offline   Reply With Quote
Unread 16 Oct 2003, 23:02   #28
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Quote:
Originally Posted by inf
specify kinetic energy, then no energy at absolute zero.
Actually, absolute 0 doesn't imply 0 energy, just the minimum amount of energy that the atom can have before it collapses.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 23:03   #29
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

You would never, ever, ever get a question asking you to "write all you know about covalent bonds". Thats the exact phrase my high school Chemistry teacher used when she told us what not to ever, ever, ever write. I'd ask if you were she, but as far as I know she's not in Trinity College right now.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Unread 16 Oct 2003, 23:05   #30
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

He's doing classics, what does he know?

ps

The only subject I know where they HAVE to award you credit for alternative solutions (in some cases more) is mathematics.
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 23:08   #31
Proteus
Lord Denning
 
Proteus's Avatar
 
Join Date: Feb 2003
Location: City of London
Posts: 2,548
Proteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriendProteus needs a job and a girlfriend
Re: Chemistry question

Quote:
Originally Posted by MrL_JaKiri
He's doing classics, what does he know?
__________________
Please bear in mind when reading the above post that I am always right.
Quote:
Originally Posted by Marilyn Manson
He was crowned in York Cathedral as 'Expert in the West' by Pope Urban III in 1186.
Proteus is offline   Reply With Quote
Unread 16 Oct 2003, 23:09   #32
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

Is this High School or Uni we're talking about? All through High School at least, I was awarded full marks for any correct answer with supporting proof in all subjects except History (well I didn't take it, but my friends told stories). Saying "the holocaust didn't happen" even if you provided evidence for it, gave 0 marks.

"Alternate" solutions were rare because most questions were very carefully worded. But the still happened occasionally.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Unread 16 Oct 2003, 23:12   #33
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,481
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: Chemistry question

Uni I presume, which generally means the answer is 'Whatever the lecturer wants'
MrL_JaKiri is offline   Reply With Quote
Unread 16 Oct 2003, 23:15   #34
Bunga
I'm not a poet
 
Join Date: Sep 2000
Location: Uppsala
Posts: 603
Bunga has a little shameless behaviour in the past
Re: Chemistry question

True. Most of my lecturers gave credit for any correct solution, but there were a couple.... gah! Lennart was a p***k.
__________________
'There's no place like 127.0.0.1...there's no place like 127.0.0.1'
Bunga is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
GNU General Public License question Ragnarak Programming and Discussion 7 1 Sep 2003 22:04
The ANSWER JammyJim General Discussions 23 15 May 2003 10:48
An Interesting Question CrashTester General Discussions 18 4 May 2003 00:57
Question to various WEET HCs. Urkki Alliance Discussions 21 13 Apr 2003 13:58
Cryptography Question Miserableman Programming and Discussion 18 25 Feb 2003 21:14


All times are GMT +1. The time now is 14:05.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2002 - 2018