Science & Mathematics - 17 August 2007

i don't understand why the lettlers are where ever they are. is there always a key guide or somthing? like a=2 and b=5
so a+b=7? i just don't under stand what the numbers and letters mean together. im going into 9th and im freaking out!

2007-08-17 08:20:53 · 9 answers · asked by johnny_girl1001 1 in Mathematics

1.

5x2 + 4y2 - 20x +48y + 164 = 0
2.

y2 - 8y +1 = 0
3.

4x2 - y2 - 24x - 2y + 35 = 0

2007-08-17 08:19:39 · 4 answers · asked by Anonymous in Mathematics

1. 2 kg mass whirled in vertical cirle of radius 3 m at constant speed of 4 m/s. What is its kinetic energy?

2. A mercury barometer reads 780 mmHg. The pressure in Pa= 104,000 what will it read if the working fluid is changed to water?

3. 20 g mass is hung from spring length 16 cm. Adding 10 g increases length to 19 ccm. What is unstretched length of spring?

4. formula for rotational inertia?


PLEASE HELP FINAL THIS WEEK!

2007-08-17 08:19:27 · 2 answers · asked by Anonymous in Physics

Find the perimeter of a semi circle of diameter 10cm.

2007-08-17 08:17:54 · 12 answers · asked by Anonymous in Mathematics

NASA has decided not to repair the Shuttle. The damage is not sufficient to endanger the crew, but could cause some damage which would cost a lot to repair on earth. Not to mention the fact that space walks could be dangerous to the people and could result in more damage to the tiles.
But, it seems wise to me that this would be the best opportunity to test the ability of a tile patch. It could show not only how well it could be done, but also how well the patch would survive re-entry.

What are you thoughts?

2007-08-17 08:17:37 · 5 answers · asked by justaskn 4 in Astronomy & Space

When magnesium is bured in the presence of oxygen the magnesium and oxygen combine to produce magnesium oxide There are 6 grams of magesim and 4 grams of oxygen If 8 grams of magnesium oxide is produced and all the mageium was used up haow many grams of oxygen are left?

2007-08-17 08:17:35 · 3 answers · asked by Ken h 1 in Chemistry

2007-08-17 08:14:36 · 1 answers · asked by Anonymous in Chemistry

I would really appreciate it.... if you would explain to me how to do this problem .....
Approximate 940 000 cm³ to the nearest cubic metre.
????????

Thankyou x

2007-08-17 08:12:36 · 8 answers · asked by Anonymous in Mathematics

Identical twins have the same DNA, so if 2 male identical twins Marry 2 female identical twins; and let's say both couples had a baby boy.

1) Wouldn't the boys have the same DNA?

2) Wouldn't that make them more than just cousins?

3) Wouldn't they also be twins?

2007-08-17 08:11:48 · 15 answers · asked by jcreyes35us 2 in Biology

When you graph a solution on a number line and the # is like 30 do you have to draw the number line with 0 in the middle because then the line would be big?
...-5 -4 -3 -2 -1 0 1 2 3 4 5
does 0 have to be in the middle or can it be like
... -5 -4 -3 -2-1 0
thx

2007-08-17 08:07:16 · 3 answers · asked by Anonymous in Mathematics

I have been asked to settle an argument as to how astronauts experience weightlessness. One says that there is a special building at NASA and the other says they learn by going in plane that reaches great hights and then dives so they then can experience the weightlessness

2007-08-17 08:06:56 · 16 answers · asked by Anonymous in Astronomy & Space

1. Solve by completing the square:
x^2 - 6x -3 = 0

2. Solve using the quadratic formula:
3x^2 - 2x + 1 = 0

2007-08-17 08:05:12 · 4 answers · asked by casper5 3 in Mathematics

Lavoisier

dalton

Berthollet

Proust

2007-08-17 08:03:08 · 3 answers · asked by Ken h 1 in Chemistry

2007-08-17 08:01:44 · 5 answers · asked by Ash 1 in Mathematics

In a cone with a slant height of 7.5 feet, the slant height forms a 38 degree angle with the radius. Find the surface area and volume of the cone.

2007-08-17 08:00:43 · 3 answers · asked by Anonymous in Mathematics

we've seen this break through in technology from 1900 to 2000
do you expect to have the same breakthrough from 2000-2100 or do u think that almost everything that human needs have already been made

2007-08-17 07:59:24 · 4 answers · asked by Anonymous in Other - Science

I'll allow some cheating (a few years before or after the 1900's). Was it the television? Telephone (mass-produced and used)? Radio? Nuclear bomb? Internet? PC? Cell phone? Airplanes? Space shuttle/rockets? Medical innovations (i.e. pacemakers, transplants, MRI's, etc.)? Mass-produced automobiles (i.e. Ford Model T)? Anything else I may have left out?

There's no doubt that the 20th century was revolutionary! As a quick follow up, feel free to share your thoughts on what this century's greatest invention might be.

2007-08-17 07:56:24 · 10 answers · asked by kvpatel007 2 in Engineering

What are the uses for this material?

How much does it cost for a standard barrel (40 gallons US if memory serves)?

I was reading about a specialty chemical company that was going to build a facility to make this chemical from biomass, as opposed to buying it from a petroleum refiner.

Is this a good idea?

2007-08-17 07:44:34 · 1 answers · asked by Random Guy from Texas 4 in Chemistry

please provide d sites so that I can get d information

2007-08-17 07:43:29 · 3 answers · asked by arun 1 in Medicine

Find the volume of a sphere with radius 3 cm. Leave answers in terms of pi.

For an answer I got 113 cm. Do they want me to put a pi symbol after 113?

and for the hard question:

The volumes of two similar pyramids are 27 and 64. If the smaller has lateral area of 18, find the lateral area of the larger. (Hint: Apply thereom 12-11.)

HELP!!!

2007-08-17 07:41:25 · 2 answers · asked by acetone33432 1 in Mathematics

2007-08-17 07:41:18 · 1 answers · asked by manoj n 1 in Engineering

Your opinion

2007-08-17 07:37:02 · 15 answers · asked by AznKid 1 in Weather

I started thinking about Space Shuttle Colombia i was remembering the smell in the air of the buring stuff . i was wondering if any of the debris is still out there unfound?

2007-08-17 07:32:53 · 6 answers · asked by lil_jayrunner 1 in Astronomy & Space

1. z^2/8-7z/8=1

2. n^2/2-5n/6-2=0

3. x+1/2x=x-1/2x-1

4. 2/m^2+3m-4=2/3m+12-m/m-1

5. given a zero: x=2, of the polynomial: x^3-4x^2+21x-34=0, find the others.

2007-08-17 07:32:34 · 3 answers · asked by patrice cadet5 1 in Mathematics

I actually thought of this concept when I was a sophomore. I recently found out that some people at MIT have already started researching this. My question is, will I be able to research this when I'm working on my Masters next year? Or does the concept belong soley to them now? Thanks.

2007-08-17 07:32:19 · 1 answers · asked by Galbadian 2 in Engineering

And yea, do you think theres life in Titan(the moon of saturn) since that titan also have almost the same characteristics of the earth?...maybe NASA is covering this one up again...??

http://en.wikipedia.org/wiki/Titan_%28moon%29#Life_on_Titan

in addition, i hate nasa. they're all telling us lies. sick of our government covering any life out there and airbrushing alien bases on the far side of the moon.

If we all helped each other, maybe we already achieved a spacecraft similarly to the ones that extraterrestrial use with super propulsion, aniti-gravity,an-ti matter and etc..

Check this guy who is sentenced for 70 years in prison for hacking NASA computer files and top US organizations about UFO's :

http://en.wikipedia.org/wiki/Gary_McKinnon

http://www.youtube.com/watch?v=B4PkNPCEnJM

THE ABSENCE OF EVIDENCE - IS NOT THE EVIDENCE OF ABSENCE....we aren't alone..think outside the box guys..

truth is out there.

2007-08-17 07:28:07 · 11 answers · asked by shoCkey 3 in Astronomy & Space

2007-08-17 07:27:51 · 7 answers · asked by HINESKECHUP 1 in Physics

2007-08-17 07:27:17 · 5 answers · asked by Sajiah Z 1 in Mathematics

Are they solid? Why don't we have rings around Earth? What do they do?

2007-08-17 07:23:22 · 4 answers · asked by Anonymous in Astronomy & Space

2007-08-17 07:16:05 · 6 answers · asked by Scotty 3 in Mathematics