Science & Mathematics - 24 September 2007

2007-09-24 23:52:39 · 3 answers · asked by redhunter 1 in Physics

plz tell as soon as possible

2007-09-24 23:51:04 · 2 answers · asked by sanchit a 1 in Weather

2007-09-24 23:46:49 · 17 answers · asked by Oompie 1 in Astronomy & Space

This is for my high school assignment. If you're an engineer, please answer.
What is your name, age, and occupation?

My school assignment is to make a fire prevention device that helps prevent house fire. What capabilities do you think this device should have?

Do you have any suggestions on preventing or stopping a house fire?

Do you have any suggestion on making this device?

Last question. In your opinion, what is the most important attribute of teamwork?

2007-09-24 23:42:59 · 2 answers · asked by minhnhatx 2 in Engineering

ecology

2007-09-24 23:35:44 · 14 answers · asked by Anonymous in Biology

dilute nitric acid is added to an unknown solution followed by barium chloride reagent.

2007-09-24 23:32:45 · 1 answers · asked by Anonymous in Chemistry

2007-09-24 23:31:17 · 9 answers · asked by cynthia a 1 in Astronomy & Space

Name the volcano:
that killed the most people
The largest
The smallest
The one that errupts most frequently
The oldest

You dont have to answer all of them, even doing one is ok but pls state which one. thx.

2007-09-24 22:58:12 · 9 answers · asked by *Hearty Laugh* 3 in Earth Sciences & Geology

2007-09-24 22:45:59 · 24 answers · asked by Anonymous in Paranormal Phenomena

Iron balls are used in ball-bearings, bycycles and many more applications in different sizes. How the balls are manufactured on a large scale that too exactly in a sperical shape?

2007-09-24 22:37:41 · 2 answers · asked by ashramam 3 in Engineering

apparently this field and adjoining feild aprox 20 acres, used to be natural lake,which has been landfilled ,and now used for grazing ,replaced with a man made damn, reservoir further up the valley! coincidence or not there is a Roman forte only a couple of 100 yards awy?

2007-09-24 22:33:45 · 5 answers · asked by Anonymous in Earth Sciences & Geology

calculate the number of milliliters of .200 M Ba(NO3)2 which would be required to just precipitate all o fthe sulfate as barium sulfate

2007-09-24 22:12:44 · 4 answers · asked by Anonymous in Chemistry

read this article about salmonella taken to space!!.. whodathunkit?...

http://www.msnbc.msn.com/id/20960121/

2007-09-24 21:56:57 · 6 answers · asked by meanolmaw 7 in Astronomy & Space

im on long island and looking east and seeing this really bright low in the sky and then rises with the sun every 3:30am. is that a planet or are we all doomed

2007-09-24 21:32:22 · 9 answers · asked by Alligator 2 in Astronomy & Space

2007-09-24 21:27:47 · 5 answers · asked by Anonymous in Mathematics

Line l goes throught the point (2,–4) and is perpendicular to the line through (–6, 5) and (–3, –2). Find the slope of l. Match your result to the correct answer below.
A) 37
B) 73
C) -73
D) 0

Which of the following equations represents a line l that goes through (2,1) and has slope –3?
A) y = –3x + 6
B) y = –3x + 3
C) y = 3x – 7
D) y = –3x + 7

. Find the equation (in standard form) of the line through (5, –5) and (8, 1). Match your result to the correct answer below.
A) 2x + y = 15
B) x – 2y = 30
C) 2x – y = 15
D) 230xy−=215

2007-09-24 21:27:27 · 2 answers · asked by Lady E 1 in Mathematics

2007-09-24 21:26:24 · 3 answers · asked by Anonymous in Mathematics

2007-09-24 21:24:53 · 2 answers · asked by Anonymous in Mathematics

If you are standing at latitude 44° north, which of the following stars will be circumpolar from your location?

A) Bellatrix (g Orionis), declination = 6° north

B) Caph (b Cassiopeiae), declination = 59° north

C) Almaaz (e Aurigae), declination = 44° north

D) A and B

E) All of the above.

The answer is b..but why?!

2007-09-24 21:21:48 · 1 answers · asked by Jfadsl L 1 in Astronomy & Space

I want to take up a martial arts class and the place i want to study at has these two styles to choose from. i was wondering what the difference was, which is a better style to choose from as a beginner and which will provisde a better overall fitness?

2007-09-24 21:21:39 · 3 answers · asked by Anonymous in Astronomy & Space

I think this will become the basis of producing Hydrogen by using water. Is there someone who has done and experiment on Hydrogen fuel? I want to know a couple of things:
1) How much hydrogen do you need to create a fire?
(nothing fancy, just the amount that is needed to create a matchlike fire)
2) How much hydrogen can Chemalloy produce?
(I know Chemalloy can produce 0.5 V, but I couldn't find the hydrogen volume that it creates)
3) If you think chemalloy is not the solution, then what is?

Thx in advance.

2007-09-24 21:21:21 · 1 answers · asked by Arip 2 in Chemistry

2007-09-24 21:17:24 · 9 answers · asked by Anonymous in Chemistry

Recessive trait in Genetics--Biology.

2007-09-24 21:12:15 · 0 answers · asked by Blah. 2 in Biology

its a plumbing question

2007-09-24 21:11:42 · 4 answers · asked by Anonymous in Engineering

I have a sphere that weighs 56.7 grams. Also, I know that the sphere has a density of 11.352 grams per cubic centimetre.

Is it possible for me to find the radius of the sphere. I was thinking of perhaps trying to use the sphere volume formula which is:

4/3 * pi * radius cubed

Perhaps I could get the radius isolated but I'm kinda struggling. Is it possible to find the radius using only the mass and density? I know the answer is like 21.208 or something but I don't know how to get it.

Please help! Any answers or help are appreciated. Thankyou!

2007-09-24 21:08:22 · 9 answers · asked by รզlεսռց ☆ 6 in Mathematics

a. (64/27)^-1/3 X 125^2/3


b. if 6x=5^1000 , find x

2007-09-24 21:08:15 · 7 answers · asked by Anonymous in Mathematics

a. let y = 0.4 when x=2.5. Find y when x=4

b. The number of hours, h that it takes m men to assemble x machines varies directly as the numbers of machines and inversely as the number of men. If fore men can assemble 12 machines in four hours, how many men are needed to assemble 36 machines in eight hours.

2007-09-24 21:05:18 · 4 answers · asked by Anonymous in Mathematics

a. 2+3/24(x/4-1)=1/3 solve the x


b. evaluate 2^2 + (2x)^2/log₂ 32

2007-09-24 20:56:52 · 3 answers · asked by Anonymous in Mathematics

Is ischemia seriious? Is it the same as bracycardia or tachycardia? Should i be worried about it or is it OK like an allergy bothers you, but isn't serious? Are there better meds for it than Lipitor? Is there minor ischemia and worse ischemia. I haven't had an echocardiogram. I can't get a handle on this through my dr. I cannot stop the stress or PTSD that I have. I know that the stress is very bad for me, but I can't seem to stop it.. Any info. anyone can give me will be greatly appreciated.

I would love a medical referral for the ischemia or PTSD in San Francisco or Berkeley/El Cerrito area. Thank you all. Jay

Jay

2007-09-24 20:53:27 · 3 answers · asked by Jay 2 in Medicine

a . log₂ 5 + 3 log₃ x=3

b. If x=2y-4 and y = 7s + 1, express s in term of x

2007-09-24 20:51:37 · 3 answers · asked by Anonymous in Mathematics