Science & Mathematics - 17 October 2007

simplify
a+4 over 16a + 3a+4 over 4a squared

2007-10-17 12:08:04 · 5 answers · asked by ry ry 3 in Mathematics

can it even happen?

does it happen wen sea level rises at that certain area?
but if thats the case...it would still be connecte to the mainland underwater

does any1 knoo??

2007-10-17 12:06:56 · 3 answers · asked by Anonymous in Earth Sciences & Geology

organisms of commensalism and 2 organisms of parasitism?????

plz answer this question too:
http://answers.yahoo.com/question/index;_ylt=AqB3_VIc4VWLz70e3J0WOBDty6IX;_ylv=3?qid=20071015150445AABW5dc

2007-10-17 12:05:48 · 2 answers · asked by Anonymous in Biology

Why is a ball shot from a spring gun at 45 degrees yield greater distance then one at 30 or 60 degrees?

2007-10-17 12:05:21 · 3 answers · asked by Anonymous in Physics

2007-10-17 12:03:11 · 5 answers · asked by Anonymous in Mathematics

2007-10-17 12:02:44 · 6 answers · asked by pinoy_92 1 in Physics

2007-10-17 12:02:13 · 1 answers · asked by Hadia A 1 in Botany

Well, and tea, too. But that would have ruined the alliteration.

Anyway, after tea, they decided to burrow out a larger burrow. In the first hour, they burrowed out 427 cubic inches of dirt. In the next hour, they burrowed out 256 cubic inches of dirt. In the third hour, they burrowed out 312 cubic inches of dirt. In the fourth hour, they burrowed out 546 cubic inches of dirt. In the fifth hour, they burrowed out 656 cubic inches of dirt. And in the sixth hour, they burrowed out 823 cubic inches of dirt. They continued for one more hour after that.

How many cubic inches, total, did they burrow in those seven hours?

2007-10-17 12:01:44 · 6 answers · asked by Carol S 1 in Mathematics

There's this tree in my backyard, and i have no idea what kind it is. Here's some information so you can maybe help me.

It has large flat leaves that are extremely smooth on one side, and kind of rough on the other.

It has stalks that grow from the stems that kind of look like larger versions of green-beans.

The bark is a gray color.

It drips tree sap in a brownish color.

Please help....

2007-10-17 12:01:25 · 3 answers · asked by Ryan B 2 in Botany

The total volume of hydrogen gas needed to fill the Hindenburg was 2.00 x 108 L at 1.00 atm and 25.0°C. How much energy was evolved when it burned?
H2(g) + (1/2)O2(g) H2O(l), change in H = -286 kJ

2007-10-17 12:00:29 · 1 answers · asked by khanh1023 1 in Chemistry

Identify the hybridization of the carbon atom(s) in CN-

Also give the number of π bonds in the molecule or ion

An example of an answer would be: sp3 2 meaning the hybrid orbital on C is sp3 and there are two pi bonds. This would be a wrong answer though, if you think about it.

2007-10-17 11:58:54 · 1 answers · asked by physicsisgay 2 in Chemistry

consider the reaction
C2H5OH(l) + 3O2(g) 2CO2(g) + 3H2O(l); change in H = -1.37 x 103 kJ

Consider the following propositions:
I. The reaction is endothermic.
II. The reaction is exothermic.
III. The enthalpy term would be different if the water formed was gaseous.

Which of these propositions is (are) true?

2007-10-17 11:58:42 · 2 answers · asked by khanh1023 1 in Chemistry

I need help with nomenclature naming, is there an easy way to memorize binary, and polyatomic ions, and recognize the suffix ending? Why is HCLO hypoclourous acid and HCLO4 perchloric acid? WHY THE HYPO?

2007-10-17 11:58:38 · 2 answers · asked by Anonymous in Chemistry

Using the correct area of the football field in square inches and using 15 square inches as the area of a $100 bill, how many $100 bills would it take to cover a football field to the nearest whole bill?

2007-10-17 11:55:44 · 2 answers · asked by Anonymous in Mathematics

2007-10-17 11:55:15 · 3 answers · asked by Anonymous in Chemistry

A $100 bill has an area of about 15 square inches. A football field is 100 yards by 53 1/3 yards. What is the area of the football field in square inches?

2007-10-17 11:55:07 · 9 answers · asked by Anonymous in Mathematics

please explain like which number you subtract or add both sides from and why??? please im confused.also in 3x-10=2x+2

i understand how to do it and all but i just need to now which number to use when i subtract/add both sides from....

2007-10-17 11:53:45 · 7 answers · asked by Soprano 2 in Mathematics

2007-10-17 11:53:22 · 19 answers · asked by tony_thegreek 1 in Zoology

I need a 7 letter word for a depression on the moon caused by meteorites please help!

2007-10-17 11:53:07 · 4 answers · asked by Marcela O 1 in Astronomy & Space

SF6 and NO2^-1 please and thank you. Im stuck on these two.

2007-10-17 11:52:15 · 1 answers · asked by Anonymous in Chemistry

2007-10-17 11:44:35 · 3 answers · asked by anonymous 4 in Zoology

2007-10-17 11:44:19 · 1 answers · asked by Anonymous in Chemistry

i need some sort of structure and make an analogy about a cell, i have some in mind, but i want something REALLY CREATIVE and it can be anything, these are the ones i have, and i cant do CITY so plz dont post city.

-airplane? but i need something more original!
PLEASE HELP I NEED IT!

2007-10-17 11:43:08 · 1 answers · asked by John S 1 in Biology

Can someone show me the steps to solving this? Thank you!

8 cos^2 (theta) - 3 = 1

2007-10-17 11:42:15 · 11 answers · asked by Anonymous in Mathematics

Some rabbits decided to burrow out a larger burrow. In the first hour, they burrowed out 427 cubic inches of dirt. In the next hour, they burrowed out 256 cubic inches of dirt. In the third hour, they burrowed out 312 cubic inches of dirt. In the fourth hour, they burrowed out 546 cubic inches of dirt. In the fifth hour, they burrowed out 656 cubic inches of dirt. And in the sixth hour, they burrowed out 823 cubic inches of dirt.

How many cubic inches, total, did they burrow in those seven hours? how do I find the answer

2007-10-17 11:41:21 · 4 answers · asked by clawedstar 1 in Mathematics

2007-10-17 11:41:10 · 17 answers · asked by Evie C 1 in Other - Science

2007-10-17 11:40:27 · 4 answers · asked by Anonymous in Geography

2007-10-17 11:40:27 · 1 answers · asked by Anonymous in Geography

2007-10-17 11:39:46 · 1 answers · asked by Midori 2 in Earth Sciences & Geology

how the things disappeared in bermuda triangle

2007-10-17 11:38:55 · 5 answers · asked by umesh g 1 in Geography