Science & Mathematics - 29 January 2007

I have to do a presentation in chemistry on extracting iron from it's ore [Haematite] and I'm really fed up of just finding the boring old facts about how it's done [reacting with carbon and carbon monoxide] etc.
Has anyone out there got ANY interesting facts about this process that will make my presentation just a bit more appealing, or will everyone just have to fall asleep?!
Thanks!
Lorna

2007-01-29 06:43:10 · 1 answers · asked by Anonymous in Chemistry

3e^y + 5e^-y = 16

Find the values of y!

Please show your workings so I can actually understand it!

2007-01-29 06:42:57 · 6 answers · asked by Emma C 4 in Mathematics

2007-01-29 06:41:33 · 5 answers · asked by Anonymous in Geography

2007-01-29 06:41:29 · 35 answers · asked by Lolita L 1 in Geography

2007-01-29 06:40:59 · 7 answers · asked by kellyray2000 1 in Astronomy & Space

2007-01-29 06:39:34 · 3 answers · asked by Hey ;) 3 in Physics

I can always state around 46-47 but i always forget a couple obvious ones.

2007-01-29 06:38:45 · 6 answers · asked by Anonymous in Geography

A) Commutative property of addition
B) Associative property of addition
c) Distributive property

2007-01-29 06:36:55 · 7 answers · asked by momoftwins1986 1 in Mathematics

give an example of an exothermic reaction that produces
- heat & light
- electricity
- several forms of energy at once.



1.a) write a word equation to represent the breakdown of water into its two elements.

b) what form of energy can cause this reaction to take place?

c) compare this reaction to the burning of hydrogen. how are the two reactions similar? how are the different?

2007-01-29 06:33:43 · 1 answers · asked by Guitr Playrrr 2 in Chemistry

(especially on darker skinned people)

2007-01-29 06:32:34 · 4 answers · asked by Kraljica Katica 7 in Biology

2007-01-29 06:32:25 · 2 answers · asked by LALALAND 1 in Mathematics

2007-01-29 06:31:24 · 5 answers · asked by Anonymous in Other - Alternative

2007-01-29 06:31:06 · 2 answers · asked by Anonymous in Mathematics

Two unrelated organisms become similar in appearance and function as they adapt to similar environments. This is an example of what?

A. Homologous structures
B. Convergent evolution
C. Adaptive radiation
D. Divergent evolution

2007-01-29 06:30:40 · 7 answers · asked by Rattiesrule 2 in Biology

How do you calculate current when the resistor value is given in kilowatts

2007-01-29 06:29:57 · 5 answers · asked by man_fredk 1 in Engineering

2007-01-29 06:28:18 · 4 answers · asked by princess-of-somany 3 in Mathematics

Something was on the news but i didnt catch it all.Did they say its gonna explode or what ?

2007-01-29 06:28:02 · 3 answers · asked by Kieran 2 in Earth Sciences & Geology

This is for a project for my Environmental Science!

2007-01-29 06:27:25 · 2 answers · asked by Amanda M 1 in Botany

I've got 2 packs of antihistamine tablets (Glapharm hayfever and allergy relief) - the packet Ive been using are called 'cetirizine hydrochloride'. I bought a new pack to use, thinking they were the same but these new ones are called ' cetirizine dihydrochloride' - what's the difference & will it be ok for me to take the new pack?

2007-01-29 06:26:56 · 5 answers · asked by gotaquestion123 2 in Medicine

2007-01-29 06:23:26 · 1 answers · asked by Jagdeep g 1 in Medicine

Suppose that the voltage measured on a voltmeter is 15V. The calculated value of the voltage was 14.2 V. Compare the % error for this laboratory experiment.

2007-01-29 06:21:21 · 3 answers · asked by RITA 1 in Engineering

WHat did it do

2007-01-29 06:21:13 · 1 answers · asked by Anonymous in Mathematics

I read this information:
[that the time is relative, because its related to the place, example if 2ppl born in the same time one of them on Earth and the other one on Jupitar ,when the first one become 60 the other one will be 5 only-according to jupitar -]
regarding the example i think that the human body has its own aging time which is related to the earth even if it is not living on it. i mean that the one who is on jupitar is 5 right, but his body will be a body of 60.
so in the future if we could live on other planets i dont think that our aging will be affected ,and if the planet has long day like jupitar we will have to divide it into years ,instead of dividing the years into days like the earth.

or thats not right and our bodies will really be affected by the place ,so if you travel to jupitar for two years you will comeback younger than your son.
what do you think?

2007-01-29 06:20:22 · 6 answers · asked by ink 2 in Astronomy & Space

Which of these events contributes most to the formation of new species?

A. Adaptive isolation due to competition
B. Genetic isolation through polyploidy
C. Mate selection
D. Physical isolation of populations

2007-01-29 06:19:51 · 5 answers · asked by Rattiesrule 2 in Biology

THE density f copper wire is 8.96g/cm cubed answer has to be in cm cubed

2007-01-29 06:18:30 · 5 answers · asked by Hey ;) 3 in Physics

When does Normal Flora become opportunistic?

2007-01-29 06:18:12 · 3 answers · asked by Anonymous in Medicine

I am using a K20 Lens to look at the moon - it is perfect - I can see the moon nice and clearly.

It's not as magnified as I would like - so I change to my SR4 lens. - WHOA Too big! - but still a nice picture, just not enough of the field of view.

So - I then changed to my Barlow 3x lens and I can't get a picture at all, it just comes out as a huge fuzzy white mass of blur!

Am I doing something wrong here? Should I be using this Barlow lens with a different type of lens?

I need a bit of advice on how to use it effectively.

(I am using a small Celestron PowerSeeker60 :P - if that helps)

Thanks in advance! =)

Jonathan
(Amature Astronomer in the makings!!)

2007-01-29 06:17:02 · 3 answers · asked by Anonymous in Astronomy & Space

I'm trying to decipher information I got from our tissue culture technician.

2007-01-29 06:16:46 · 4 answers · asked by Chris 1 in Biology

2007-01-29 06:15:46 · 9 answers · asked by Anonymous in Chemistry

reasonable and intelligent answers please...no dumbaas crap

2007-01-29 06:14:04 · 5 answers · asked by Anonymous in Weather