Science & Mathematics - 19 January 2007

so there could be lower electricity bill.

2007-01-19 15:21:46 · 9 answers · asked by MELISSA G 1 in Engineering

We have a 3 Set Venn Diagram. The sets are A, B, and C. How many regions of the Venn diagram correspond to elements that are part of set A? Why so many?

2007-01-19 15:20:56 · 3 answers · asked by Anonymous in Mathematics

The mathematical definition of a diagonal is "an adjacent line that bisects a polygon." Does anyone know of an theorem/equation that will determine how many diagonals a polygon has, without having to do a drawing to see how many there are? An example is how many diagonals would a decagon (10 sided polygon) have?

2007-01-19 15:20:19 · 8 answers · asked by roxii 2 in Mathematics

2007-01-19 15:19:41 · 5 answers · asked by Fruit Loopz 1 in Chemistry

please give me comparisons or measurements.... anything, thanks

2007-01-19 15:18:37 · 11 answers · asked by Anonymous in Physics

I know they cut the hole with a long hole saw but how do they cut the bottom of the plug they just cut around?

2007-01-19 15:15:11 · 2 answers · asked by Anonymous in Other - Alternative

2007-01-19 15:13:59 · 4 answers · asked by rhazzellee 1 in Chemistry

(For example, 4 is written as $**; and; 3 is written as $$)



17 X 370=



Avg(15,65,90,2)=



i am preparing for accenture please give me the answer early i need urgent

2007-01-19 15:12:02 · 2 answers · asked by Deepak S 1 in Engineering

2007-01-19 15:00:30 · 12 answers · asked by wawa 34 2 in Geography

I understand AC travels better than DC. Why? I understand that alternating faster is better? Why? How do they make honest, God-fearing elictricity alternate?

2007-01-19 15:00:08 · 6 answers · asked by Mike D. 3 in Engineering

what is 191 times 57 divded by 7

2007-01-19 14:58:11 · 20 answers · asked by Nate K 2 in Mathematics

I don't find speed reading much effective for studying sceince subjects(Physics, Chemistry, Biology, Mathematics). I think the more slowly you read the more the concepts become clear. The faster you read the more you go past without understanding a thing. Is this just my problem or a general problem with speed reading?

2007-01-19 14:55:46 · 7 answers · asked by Johnny 1 in Other - Science

You are heating a quart of boiling water. After taking it off of the burner, you have the task of getting the water to the lowest temperature possible at the 15 minute mark. You MUST add 50 ml of ice water in order to do so (can't omit it).

Should you add the ice water immediately after taking the boiling water off of the burner, or wait add the ice water at the 14-minute mark? It is either or; no times in between. Or does it matter at all?

2007-01-19 14:54:28 · 8 answers · asked by Cantaloupe 2 in Chemistry

I am erecting a sail which is an equilateral triangle with each side being 5 metres long. I intend to sink two holes against a straight wall five metres apart (actually a bit more for allowing for fittings) and I want to know how far out to dig the third hole.
Same question but an addition to this project. I also purchased a seconb sail which I want to butt up against the first one (5 metre side touching the other 5 metre side) the finished result would be a rhombus(?) of two triangles. One pointing outward and the other pointing inwards but touching the other. I am completely bamboozled. Thanks Pauline

2007-01-19 14:54:15 · 2 answers · asked by Pauline H 1 in Mathematics

1.618

2007-01-19 14:52:35 · 11 answers · asked by nhicky 1 in Mathematics

2007-01-19 14:52:13 · 3 answers · asked by vishnunandini a 1 in Medicine

2007-01-19 14:45:35 · 5 answers · asked by Marina K 1 in Engineering

okey dokey. to ge 1000 gallons of mixture that was 35.2% alcohol, it was necessary to mix some 20% alcohol solution with some 40% alcohol solution. how much of each solution was required?

(now, i know u use like Pn and Dn and that but i'm just not sure of the rest...could u help me?)

2007-01-19 14:42:34 · 8 answers · asked by judykharrison 1 in Mathematics

2007-01-19 14:41:26 · 7 answers · asked by wriggs 1 in Earth Sciences & Geology

Why is it that we have hair? Espically pubic hair?
Why is that some humans have more hair then others?

2007-01-19 14:41:00 · 20 answers · asked by silvs 5 in Biology

2007-01-19 14:34:08 · 9 answers · asked by wriggs 1 in Earth Sciences & Geology

Calcium carbonate was thremally decoimposed . The ensuing gas completely neutraliserd one litre of 0.1N solution of ammonia. Assuming complete decomposition calculate the mass of calcium carbonate decomposed.

2007-01-19 14:34:01 · 3 answers · asked by Anonymous in Chemistry

2007-01-19 14:28:48 · 12 answers · asked by Anonymous in Earth Sciences & Geology

what store would sell a voltmeter? it's for my science project.
do any of you know what kind of store sell that?
ex) fred meyer, cost-co.. or etc.

2007-01-19 14:27:33 · 6 answers · asked by JJ 1 in Physics

Can you please explain the following:
The addition or removal of a substance in solid or liquid state does not change the concentration of that substance. The reaction of conndensed phases takes place only at an exposed surface- and if the surface exposed is changes it is always exactly the same chnage in available area for both forward and reverse reaction collisions. The forward and reverse rates will change by exactly the same amount if they change at all, so equilibrium is not disturbed and no shift occurs.

2007-01-19 14:22:40 · 2 answers · asked by S 3 in Chemistry

2007-01-19 14:21:28 · 7 answers · asked by Kripster 1 in Zoology

component measurin instruments are a part of electronic measurements and instrumentation...it would be help ful if some one helps me to explain this...it there is any website linked wid it pls gimmme the link

2007-01-19 14:18:07 · 4 answers · asked by sandy 1 in Engineering

In 39 s ; a pump delivers 0.619 dm^3 of oil
into barrels on a platform 39 m above the
pump intake pipe. The density of the oil is
0:832 g/cm3 :
The acceleration of gravity is 9.8 m/s2 :
Calculate the work done by the pump. An-
swer in units of kJ.
part2
Calculate the power produced by the pump.
Answer in units of kW.

2007-01-19 14:17:37 · 3 answers · asked by kavita 1 in Physics

And I would like a good answer, not one that says "Magnets". Please describe how it works to me. Is it magnetic repultion or attraction?

2007-01-19 14:17:21 · 7 answers · asked by Anonymous in Engineering

In nine years, to save up $255,000, how much must be saved back per 3 month period at 3.75% compound interest to meet this goal?

I'm looking at 36x+(.0375x)=255000. But I have this feeling that I'm dead wrong...

2007-01-19 14:16:29 · 5 answers · asked by Gear 1 in Mathematics