Science & Mathematics - 21 August 2007

will gasoline float or sink in water?

2007-08-21 13:48:28 · 35 answers · asked by Anonymous in Chemistry

2007-08-21 13:48:22 · 18 answers · asked by roxygurl_guessgurl 1 in Mathematics

Refer to figure, Which similarity can be used to prove that triangle ABC ~ triangle JKL?
http://i56.photobucket.com/albums/g198/simplybebop/untitled13.jpg

In the figure L II m II n. Find DF
http://i56.photobucket.com/albums/g198/simplybebop/untitled24.jpg

2007-08-21 13:39:11 · 3 answers · asked by simplybebop 1 in Mathematics

2007-08-21 13:32:29 · 2 answers · asked by nicree475 1 in Physics

Getting ready to buy the 8" NexStar SCT and want to determine the best accessories.

2007-08-21 13:29:51 · 4 answers · asked by Anonymous in Astronomy & Space

thank's

2007-08-21 13:28:08 · 4 answers · asked by Anonymous in Physics

Would it be some type of mass or a force like gravity????...Thanks for the awesome insight...Tom Science 4

2007-08-21 13:26:26 · 4 answers · asked by Anonymous in Physics

i have no clue how to do this kind of a problem please help.

solve the following equation

6k=2/3 (5p-2)


and
3/4x + 1=4

how did you solve it?

2007-08-21 13:25:14 · 2 answers · asked by Anonymous in Mathematics

I wanted a pair of binoculars for look at the moon, and casual stargazing. But I didn't want to have to use a tri-pod. Also I wanted to keep the cost reasonable, so I though this pair was pretty good, please give me your feed back on what you think. And if you think there is another better pair with about the same price please give me the link!

http://www.opticsplanet.net/celestron-outland-lx-10x50-binoculars.html

2007-08-21 13:20:20 · 6 answers · asked by Jenny 2 in Astronomy & Space

A student wants to determine gravity, so he drops a ball and records the time of fall.
Data:
Distance(m): 0.10 0.50 1.0 1.7 2.0
Time(s): 0.14 0.32 0.46 0.59 0.63
If only distance and time are used, what quantities should the student graph in order to produce a linear relationship between the two quantities? Also, how can I find the acceleration using the data I already have? please help!
Any information would be helpful. If you give a website, please be specific as to where I can find help for this problem.

2007-08-21 13:17:11 · 4 answers · asked by Anonymous in Physics

2007-08-21 13:14:28 · 13 answers · asked by RB 1 in Physics

I don't see why Mars seems lifeless, but I'm sure there is some kind of life there. Unlike Mars itself, Venus definitely has no life because of the thick layer of toxic clouds covering it.

2007-08-21 13:09:42 · 6 answers · asked by Anonymous in Astronomy & Space

what are
Pb(C2H3O2)2
CuSO4
MgSO4
Mg(OH)2
CaSO4
N20

the answers are:
cugar of lead
blue vitrol
epsom salts
milk of magnesia
gypsum
laughing gas

[just kinda matching]
THANKS <3

2007-08-21 13:04:30 · 4 answers · asked by Stephanie P 2 in Chemistry

I need to put together a beginning-to-end case study on a pathology for a radiology class. I'm looking for ideas on what pathology to use. Mesothelioma would be an example of an overused topic. I'd like to do something rare and a bit bizarre, something visually captivating. Like a human who's grown wings, for example. Any suggestions?

2007-08-21 12:55:46 · 8 answers · asked by roentgenologist08 2 in Medicine

2007-08-21 12:55:44 · 4 answers · asked by Anonymous in Mathematics

2007-08-21 12:55:09 · 12 answers · asked by Anonymous in Mathematics

Can some one show me how to solve this.

The equation .2t 3rdpower+.2t 2nd power-8t+1=.1t 2nd power+3t+2


has three solutions. find them(accurate to three decimal places.)

2007-08-21 12:54:30 · 3 answers · asked by TJW 1 in Mathematics

2007-08-21 12:51:47 · 4 answers · asked by Danny V 1 in Biology

If we are ever to have the ability to travel through time (back into the past) wouldn't we be seeing people from the future showing up here?

2007-08-21 12:46:52 · 5 answers · asked by geckosgirl 2 in Physics

2007-08-21 12:44:56 · 15 answers · asked by Anonymous in Mathematics

i have to write an algerbraic expression for the word problems and out of the 60 i cant get these....

let t be the total amount kat spent for blouses. each of the 5 blouyses cost the same. write an expression for the cost of each blouse.

let d be the distance paul ran. steve ran a third as far as paul. write an expression for he distance steve ran.

if anyone could help that would be great

2007-08-21 12:44:49 · 5 answers · asked by Anonymous in Mathematics

How do u solve this system of equations?

-x + 3y = 0
2x + 6y = 12



thank u =]

2007-08-21 12:43:52 · 5 answers · asked by Anonymous in Mathematics

1, 4, 9, 16...

What's the next number and the method that the sequence is using?

2007-08-21 12:43:10 · 4 answers · asked by Anonymous in Mathematics

well i may want to become a doctor but about how much does a doctor needs to know, well i have A.D.D (attention deficit disorder) and i can also easy forget things too, does anyone think i can last as a doctor? be honest i can handle the truth

2007-08-21 12:38:26 · 4 answers · asked by Anonymous in Medicine

2007-08-21 12:27:13 · 7 answers · asked by thicknessallover 1 in Earth Sciences & Geology

Hi. I need a solution to this problem. The question is find the perimeter and area of the shape. In my book it says that the answer is : Perimeter is 49.7cm and the Area is 129.3cm2.
The measurements are 4cm, 5cm, 6cm and 7 cm.

A rough image of the shapes are here:
http://img373.imageshack.us/my.php?image=areapm1.png

I know how to do areas of complicated shapes. You basically use the areas of shapes individually etc and then add them up, but this one is giving me problems.

When i try and do it i work with the top rectangle 6x7= 42cm2. Bottom rectangle 4 x 12 = 48cm2. And for the semicircle i use the area of circle foruma 'Pi * r2" and then divide 2. The radius seems to be 5cm when i do it. So 3.14*5 subtact 2 = 39.25cm2. I get the total area 129.25cm2 instead of the correct answer which is 129.3cm2. I was wondering if some people could post a guide on how to work it out and tell me what i am doing wrong. Also can you explain the perimeter. Thank you very much.

2007-08-21 12:23:58 · 4 answers · asked by Jay Garrick 1 in Mathematics

use properties and definitions of operations to show that the statements is true. JUSTIFY EACH STEP

6 (a ÷ 3) = 2a

2007-08-21 12:22:34 · 3 answers · asked by CELL 2 in Mathematics

Central Michigan UNiversity

2007-08-21 12:21:23 · 7 answers · asked by ashley m 1 in Geography

1.) 3x+5 = 23

2.) 4x+2 = 7x+1

3.) 8-3x =2+4x

4.) 5+9x = 5

and if possible, please explain... thanks in advance...

2007-08-21 12:21:10 · 7 answers · asked by Juan C 6 in Mathematics

2007-08-21 12:17:34 · 3 answers · asked by Anonymous in Biology