Science & Mathematics - 25 September 2007

1. 4pi/radians 5
2. 3pi/radians 4
3. 5pi/radians 6
4. 3/pi radians 5

2007-09-25 13:30:18 · 4 answers · asked by dilljam1977 1 in Mathematics

ok so idk if i have the correct answer. so please work it out and tell me what you got. thanks. =)

How much dirt is there in a hole a foot long, a foot deep, and a
foot wide?

2007-09-25 13:28:26 · 5 answers · asked by Anonymous in Mathematics

Describe some clues you might observe during the following events that could support the conclusion that a chemical change is occuring:
a. An antacid tablet is dropped into water
b. A ring of scum forms around a bathtub
c. Iron rusts
d. a firecracker explodes

I am stuck on this question on my homework and would appreciate if someone helps me. Thanks!!!

2007-09-25 13:28:07 · 2 answers · asked by Living la vida loca!!! 2 in Chemistry

Please help me!!!

2007-09-25 13:27:36 · 5 answers · asked by Ducky 2 in Mathematics

Are food colourings safe?

2007-09-25 13:25:48 · 7 answers · asked by Anonymous in Chemistry

that 2 at the end is squared

2007-09-25 13:23:34 · 1 answers · asked by pburr17 1 in Mathematics

A dolphin jumps with an initial velocity of 11.5 m/s at an angle of 40.0° above the horizontal. The dolphin passes through the center of a hoop before returning to the water. If the dolphin is moving horizontally when it goes through the hoop, how high above the water is the center of the hoop?

2007-09-25 13:21:15 · 1 answers · asked by lstntht 1 in Physics

How can anybody logically deny evolution when Survival of the Fittest and the expressing of dominant traits surrounds all of us! Why do humans have appendixes? Why do whales have in-grown legs? How can you explain the phenomena on the Galapagos Islands?

2007-09-25 13:20:48 · 12 answers · asked by Michael S 2 in Biology

i need to know what organisms cell has chloroplast in it... please hellppp its homework and its due tomorrow!! =s

2007-09-25 13:20:41 · 3 answers · asked by pRiNcEsS 2 in Biology

1. ^/[]15 over 4
2. ^/[]15 over 15
3. 4
4. 4^/[]15 over 15

2007-09-25 13:20:32 · 3 answers · asked by dilljam1977 1 in Mathematics

c=13,a=12

a=4,b=4square root of 3

a=4,c=8

2007-09-25 13:19:49 · 1 answers · asked by edwina 1 in Mathematics

PLEASE I NEED HELP!!! Anyone who reads this please please PLEASE ANSWER IT!!! I NEED HELP!!!

2007-09-25 13:18:00 · 5 answers · asked by Anonymous in Mathematics

2007-09-25 13:17:47 · 5 answers · asked by gonja58 1 in Other - Science

A)Floating ice on a pond insulates the liquid water below, slowing its rate of freezing.
B)If ice sank,the oceans would eventually freeze solid
C)The hydrogen bonds in ice are less stable than the hydrogen bonds in liquid water
D)Ice is less dense than liquid water
E)Water naturally exist in all three physical states on Earth.

2007-09-25 13:17:06 · 10 answers · asked by Travelingstar 1 in Chemistry

Is an orbital completely filled before electrons fill the next outer orbital? I was told by another teacher that there were two electrons in the first orbital and then 8 in every other one, is this true?

I need this simple because I will be teaching it to 8th graders. I don't know how to explain electron config. simply and without formulas!

2007-09-25 13:16:41 · 2 answers · asked by sarah13star 2 in Chemistry

2007-09-25 13:14:08 · 0 answers · asked by brunette.girly 1 in Chemistry

2007-09-25 13:11:10 · 1 answers · asked by Anonymous in Chemistry

is which of the following:

A. Is more electronegative than hydrogen atoms
B. Is attracted to the negatively charged atoms of other molecules.
C.Attracts electrons less strongly than the hydrogen atoms
D Is Electrically neutral
E. Is more positively charged than the hydrogen atoms

2007-09-25 13:10:38 · 3 answers · asked by Travelingstar 1 in Chemistry

2007-09-25 13:09:02 · 1 answers · asked by zack 1 in Engineering

through how many capillary beds must a red blood cell of a human travel if it takes the shortest possible route from the right ventricle to the right atrium?

2007-09-25 13:06:42 · 4 answers · asked by runnerlvr123 3 in Biology

how do you find area of a tube
thanks you if you helped me

2007-09-25 13:06:06 · 6 answers · asked by vicky 2 in Mathematics

2007-09-25 13:04:28 · 14 answers · asked by steve r 1 in Weather

2007-09-25 13:03:22 · 6 answers · asked by Sophia 1 in Mathematics

i need an experiment that i can use, i need independent and dependent variable, control, procedure, and a hypothisis, if you could just give me an suggestions...

2007-09-25 13:02:24 · 1 answers · asked by Anonymous in Biology

A triangle has an area of 36 ft2 (squared) and a base of 9 ft. Find the height.

Please explain step by step how to figure this out.
(If possible--intermediate school level)

2007-09-25 12:58:05 · 4 answers · asked by moonii 3 in Mathematics

Bcause i was thinking for my wedding colors for the spring!!!!

2007-09-25 12:56:16 · 11 answers · asked by ms_independent1982 1 in Botany

explain the big bang to me... Im haveing a hard time with this. Please all the info i can get.. ALL FACTS

if you could put it in outline form..i like it better. tHANKSS so muchh

2007-09-25 12:53:48 · 8 answers · asked by Sun.Sand.Surf92 2 in Astronomy & Space

I got this question wrong on my test but I don't understand why.
-----An object is thrown up in the air, it reaches its max altitude. What is its acceleration at max altitude?

I put 0, the correct answer is -9.81. What I don't understand is how an object that is not moving can have an acceleration. The object is at rest, therefore I don't understand how it can feel the effects of gravity at the highest altitude. Now if the object fell for even .000000000000000001 seconds I could see how gravity would cause it to freefall. But I don't see how acceleration can pertain to an object that has no velocity.

2007-09-25 12:50:01 · 2 answers · asked by mike L 2 in Physics

I need help in solving a Physics puzzle question and help is highly appreciated.

The question is:

Imagine, for the purpose of this excercise that the earth is a smooth sphere. A rope is tied tightly around the earth at the equator. If the rope is then loosened so that 9 FEET of slack is now added uniformly around, which of the following creatures could possible crawl under the rope?

A) Amoeba
B) Ant
C) Mouse
D) Cat
E) Large Dog
F) Donkey
G) Giraffe

Thanks!

2007-09-25 12:48:36 · 2 answers · asked by UPS_b757Pilot 1 in Physics

using order of operations.
you can use exponents and roots.


i want to see who can get this first.
10 points to them

2007-09-25 12:48:24 · 2 answers · asked by Me 1 in Mathematics