Science & Mathematics - 3 January 2007

x+5 + 2x-1 (2x is on the bottom of x+5, and 4x is on the bottom of 2x-1. In other words, they are the denomenators)

These are suppose to be treated as if they are fractions,
by finding the largest common denomenator,
and then cross multipication, reducing and all of that. Still, either
my algebraic math is wrong, or something
else is wrong. Please help me solve this monster. Thank you very much.

2007-01-03 12:29:49 · 19 answers · asked by Alina 2 in Engineering

I have an aquarium that is 72 inches long, 18 inches wide and 18 inches deep. I think my aquarium holds 125 gallons but I'm not sure. What is the formula for finding out the volumn so I will know how many gallons it holds?

2007-01-03 12:28:42 · 7 answers · asked by Average Joe 3 in Mathematics

2007-01-03 12:27:22 · 12 answers · asked by theresa_xo92 2 in Physics

What is the area bounded by the line x=0 and the curves
f(x)=e^(-4x) and g(x)=11e^(3x)?

2007-01-03 12:26:59 · 2 answers · asked by delye56 2 in Mathematics

2007-01-03 12:22:45 · 12 answers · asked by Anonymous in Biology

Ok, so I need to figure out this problem involving air pressure for a story I'm writing. In my story, there is a building that is 777 stories tall (lit. 781+) ie. 2087 m or 6260 ft. Now I need to find out at what floor or height the air pressure would become so much that you couldn't breath, or could even die. And also the air pressure at the top.

If you know any good air pressure solutions, that would be great too.

Also, if any extra info is needed to solve this, I can supply it.

Thanks!

2007-01-03 12:22:33 · 3 answers · asked by Anonymous in Physics

A sundial clock indicates time at the current rotation of the earth around the sun. There is no way to reverse a sundial unless you reverse the rotation of the planet thereby reversing time. Thus, in order to reverse time you would need to create something that can spin in a counterclockwise motion faster than the earth's. Likewise you would have to create something that would spin in a clockwise motion faster than the earth's in order to exceed time or go to future.

What do u think if we had the technology to build a machine that would do this will it work?

2007-01-03 12:22:01 · 6 answers · asked by .......... 4 in Physics

I was on the beach Christmas Eve 2005 in Galveston, Texas; and the sky was clear, littered with stars but no moon. I turned all around looking for it but only saw stars. What the hell happened to the moon?

2007-01-03 12:22:00 · 8 answers · asked by dathtowngurll 2 in Astronomy & Space

I live in New York City and this is the first year from my memory than not a single snowflake has fallen. It's so weird. Temperatures are above average every day for about a month now. We're expecting 62 degrees on Saturday when the normal high temp here should be around 38. What the hell is going on?
Is it going to get cooler?
Can we jump to conclusions and blame it on global warming?
I'm scared.

2007-01-03 12:20:45 · 13 answers · asked by Anonymous in Weather

I need help setting up these problems:

For 7 x 10^33 atoms of Al, how many grams are present?

For 235.1 grams of sodium hydroxide, how many formula units are present?

What is the mass (in amu or in grams) of 5 molecules of carbon dioxide?

Thanks for the help!!

2007-01-03 12:20:32 · 4 answers · asked by Mia16 3 in Chemistry

30 centigrams
0.030 kilograms
30000 micrograms
3.0 milligrams
3.0 grams

2007-01-03 12:19:08 · 4 answers · asked by Topol 1 in Mathematics

I am trying to create an EMP (electromagnetic pulse). This will be a low range device (about 20 foot range). Does anyone have any ideas on how to do this or know where I can find out.

2007-01-03 12:19:01 · 4 answers · asked by mttcttrll@snet.net 3 in Engineering

I know that the ans would be x=12, but can someone show me the logical equation steps to solve it. Thx !

2007-01-03 12:18:15 · 10 answers · asked by Meg 1 in Mathematics

please describe

2007-01-03 12:18:03 · 6 answers · asked by Pedro 1 in Astronomy & Space

1) K2Cr2O7 + HCl >>>> KCl + CrCl3 + Cl2 + H2O

2) Bi2S3 + HNO3 >>>> Bi (NO3)3 + NO + S + H2O

3) HgS + HCl + HNO3 >>>> HgCl2 + NO + S + H2O

2007-01-03 12:18:00 · 2 answers · asked by truckin_90 2 in Chemistry

where does it come from

2007-01-03 12:17:26 · 9 answers · asked by ra ra ra ra ra 1 in Chemistry

or is it just me?!

2007-01-03 12:14:18 · 4 answers · asked by PrinceOfDarkness 2 in Astronomy & Space

2007-01-03 12:13:45 · 7 answers · asked by CK 1 in Other - Science

ok when i'm in class there is those halogen lights in the roof and when i get to school i suddenly feel very very sleepy. but this only happens at school. when i look into the lights i have the urge to yawn every single time i look up the at the lights i ywn and feel slightly more sleepy. at any time of day dosent matter i get the urge to yawn does any one know why this happens to me??? i honestly do not get it!

2007-01-03 12:11:41 · 3 answers · asked by Anonymous in Other - Science

2007-01-03 12:10:40 · 2 answers · asked by Hermes Trismegistus 2 in Weather

Humm, not sure which one is true:
-Hearing loss associated with OM is always conductive and temporary
-Hearing loss during OM may adversely affect cognition and language

Both are NOT true, apparently. Thanks.

2007-01-03 12:10:28 · 3 answers · asked by nittanyisland2000 2 in Medicine

which of there is the most approtiate worl to describe a common nail?

2007-01-03 12:09:14 · 7 answers · asked by yorambenamram250 1 in Botany

How do I get this answer?
Only using 1-9 one time how does it work?

_ _ _
+ _ _ _
_______
_ _ _

2007-01-03 12:08:52 · 7 answers · asked by Anonymous in Mathematics

2007-01-03 12:08:14 · 2 answers · asked by Anonymous in Earth Sciences & Geology

If I have population size and number of births/1000, number of deaths/1000

2007-01-03 12:06:13 · 5 answers · asked by 8 3 in Biology

Show me in steps and dont give me stupid answers plzz. Thnks

2007-01-03 12:06:13 · 4 answers · asked by Cutie 4 in Mathematics

2007-01-03 12:04:54 · 5 answers · asked by Swirly 7 in Zoology

2007-01-03 12:03:11 · 2 answers · asked by machormel 1 in Weather

from 1960 to 1990 the average annual consumption of cigarettes per American C can be modeled by the equation C=4024.5+51.4t-3.1t^2 , where t is the number of years since 1960. when did annual cigarette consumption reach 4100??
thanx

2007-01-03 12:02:12 · 7 answers · asked by pearl 2 in Mathematics

I'm doing a science fair project on Sol and I was wondering how I could figure the Sun's rotation.

2007-01-03 12:01:42 · 2 answers · asked by Anonymous in Astronomy & Space