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Science & Mathematics - 24 November 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

what is 20% of £60

2007-11-24 20:46:58 · 26 answers · asked by Anonymous in Mathematics

Particularly differential, operational , electrometer and carrier amplifiers. plss. i badly need these info. thanks so much for help. =)

2007-11-24 20:44:30 · 1 answers · asked by dangeogeof 1 in Engineering

formation of ions...???

2007-11-24 20:41:50 · 4 answers · asked by Anonymous in Chemistry

What is the difference between butterworth n=3, n=5 and n=7

2007-11-24 20:41:27 · 3 answers · asked by David Junior 3 in Engineering

i want to know if there is any region or state in US where it does not snow at all.

2007-11-24 20:36:55 · 9 answers · asked by murtala a 1 in Geography

n which container will sugar diffuse first?last?
a. sugar + ice water
b. sugar + tap water
c. sugar + salt water

if so, why?

thnx!!!

2007-11-24 20:29:40 · 1 answers · asked by jc learner 1 in Chemistry

I live in my fiances house and have heard crazy stuff within the house happening and things being lost and then found after searching the house upside down. I know for a fact that something is going on which is not human. Also, there is some sort of 6th sense where people have some sort of way of sensing something is going to happen in the future. I dont know how but someway maybe not everybody but some people are able to do so in certain circumstances in their life.

2007-11-24 20:26:53 · 13 answers · asked by Brad 2 in Paranormal Phenomena

Water flowing through a 1.70 cm-diameter pipe can fill a
200 m bathtub in 3.50 min.

What is the speed of the water in the pipe?

2007-11-24 20:26:46 · 8 answers · asked by dawance88 2 in Physics

I need to get some ether for an expeirment for making freebase cocaine

2007-11-24 20:15:11 · 1 answers · asked by Anonymous in Chemistry

tell me about all these things, i have a test tomorrow!

1- Covalent bonds (a)-sharing of electrons
(b)-single and multiple bonds
(c)-polar and nonpolar bonds

2- it says to be able to use tools to name a compound..
I dont get it, give me some examples..!

3- Metallic bonds and properties of metals - compare to ionic bonds

Thank you for your time :-)

2007-11-24 20:12:54 · 1 answers · asked by Anonymous in Chemistry

can you please explain what crystal lattice is and what does it do...and the properties of ionic compounds... I need to know because I have a test in two days! thanks!

2007-11-24 20:05:53 · 2 answers · asked by Anonymous in Chemistry

How did scienctist discover what percentage Einstine used?
What happens to the part of the brain not used is it just dormant?

2007-11-24 20:04:17 · 4 answers · asked by peachiepie 7 in Physics

just trying to figure out the world - figure they'd be able to help

2007-11-24 20:03:02 · 6 answers · asked by bandaidsrcool 2 in Other - Alternative

physic project for 2007!!

2007-11-24 20:02:17 · 2 answers · asked by sofie 1 in Physics

Explain:

1-the transfer of electrons
2-formation of ions
3-formation of ionic bonds
4-ionizing energy

thank you for your time.. I just really suck at science and I need your help...

2007-11-24 20:01:58 · 1 answers · asked by Anonymous in Chemistry

Basically What weighs more? an elastic band being stretched or an elastic band not being streched. I have been promised that the answer is not that they weigh the same, and there is a scientific answer to this question. please help had me stuck for days...

2007-11-24 19:59:50 · 4 answers · asked by wozza766 2 in Physics

not large size of the unit .
easy to maintain.
taken in considration all the green peace ragullations ( mother nature requirments )
cost of unit.
condition requ. is : 25-28 derg. c.
ambient cond. 40-50 deg. c.( under sun )

2007-11-24 19:57:13 · 3 answers · asked by iraelev 1 in Engineering

What are the positive and negative heat effects?

2007-11-24 19:56:42 · 1 answers · asked by Mujto Kuchiki 2 in Chemistry

http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/moonhalo.html

how does it form?
make the words fit so like either a dumb high schooler can get it or a smart elementry schooler can get it.
or an average middle schooler.

2007-11-24 19:50:47 · 3 answers · asked by K@T 4 in Astronomy & Space

2007-11-24 19:50:43 · 1 answers · asked by candy 3 in Chemistry

Here is the deal, the SPL formula will tell me what dB a sound will be at once it reaches a certain distance, but I need something a little different. The SPL forumla is:

(SPL2 = SPL1 + 20log[d1/d2]) where 'd'=distance

Well, I need to know how to manipulate this formula so that it will tell me the DISTANCE at which a sound reaches a certain dB.

For example, let's say I have the original distance that the sound was measured at, for our purposes we will say that it was 90 dB at a distance of 20 feet. Without a bunch of trial and error, how can I tell what distance the sound will be 20 dB at?

Thank you!

2007-11-24 19:49:54 · 2 answers · asked by Anonymous in Physics

Out of the two available fuel I have to select one based on the factors of economy. How to determine which one will be economically suitable? Please give details of experiment I should undertake.
Thanks.

2007-11-24 19:46:23 · 1 answers · asked by Anonymous in Chemistry

List their chemical bond present,hardness,solubility in water,action of heat,melting point

silicon dioxide,sucrose,sodium chloride,octadecane,and iron

2007-11-24 19:42:41 · 1 answers · asked by ??unknown?? 1 in Chemistry

Thanks everyone who answers my question.

2007-11-24 19:40:04 · 1 answers · asked by Soong 1 in Astronomy & Space

area figure that is square with three steps one full side is 2.5 and the sides 1st 1.9, 2nd 0.75, 3rd 0.9, top bottom step is 1.4

2007-11-24 19:39:10 · 1 answers · asked by roses edge 1 in Mathematics

2007-11-24 19:38:39 · 5 answers · asked by Anonymous in Physics

Find three decimal numbers bewtween 0.47 and 0.48

2007-11-24 19:37:35 · 5 answers · asked by Dumb Giirl 1 in Mathematics

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