Science & Mathematics - 2 January 2007

1. What is the value of x if x/3 + x/4= 1?

2. what is the value of a if 1/a + 2/a + 3/a +4/a= 5?

3.If the product of 4, 5, and q is equal to the product of 5, p and 2 and pq is not equal tp 0 what is the value of p/q?

2007-01-02 11:08:51 · 5 answers · asked by Jane A 3 in Mathematics

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Which continent has the most cities with a population over 10 million?

2007-01-02 11:08:31 · 7 answers · asked by BuyaZune 2 in Geography

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What is the difference between a solar eclipse and a lunar eclipse?

2007-01-02 11:07:35 · 6 answers · asked by Anonymous in Astronomy & Space

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predict whether the a carbon atom with six total electronswill form a bond with other ato0ms?

2007-01-02 11:06:56 · 3 answers · asked by marco 1 in Chemistry

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Was the september 2001 destruction of the World Trade Centres caused by fire or controlled demolition?

2007-01-02 11:06:14 · 8 answers · asked by guruwallace 1 in Engineering

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Where did the last U.S tornado occur...?

and in which state do the most tornadoes occur?

2007-01-02 11:05:40 · 6 answers · asked by Mr. Roboto 1 in Weather

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what fraction creates 0.999... ?

As you know, 0.75=3/4 ; 0.5=1/2; 0.333...=1/3. Also more,
1/9=0.111...;2/9=0.222...;8/9=0.888...And 3/9+5/9=0.333...+0.555...=0.888...=8/9.Then 0.999...is made from what fraction?

2007-01-02 11:05:30 · 11 answers · asked by Anonymous in Mathematics

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the biggest island in the world not counting Australia?

2007-01-02 11:03:31 · 8 answers · asked by Nathaniel M 1 in Geography

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Why are cell phone companies still using cellular towers for locating cell phones instead of GPS?

What are their reasons if almost every phone has a GPS chip in it now?

2007-01-02 11:00:38 · 5 answers · asked by Ilooklikemyavatar..exactly 3 in Engineering

2 ⤊

Is pepper spray effective past the expiration date?

2007-01-02 10:58:53 · 3 answers · asked by rebekkah hot as the sun 7 in Other - Science

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Scuba diver fill his lungs wit 5.5 L when 10 meters below the surface. To what volume would his lungs expand?

2007-01-02 10:58:30 · 5 answers · asked by chris 1 in Physics

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UFO in Chicago and no one mentioned it 'til today?

I just heard on tv that air traffic controllers in Chicago, on NOV 7, saw a UFO and they are just getting around to telling the public.. what is up with that!

2007-01-02 10:57:25 · 11 answers · asked by Sydmom 4 in Astronomy & Space

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How would you describe Roy Ebehardt in the book Hoot in 3 words?

2007-01-02 10:56:58 · 3 answers · asked by ISS-UH 3 in Mathematics

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Darwinism, I think?

I need to find a source that actually states that blacks came from monkeys. I remember hearing in high school, that Darwin had documented this, but I can't seem to find it online. I have found many things that say all of man has come from monkeys, but I need to find something that says only blacks did. Thanks a bunch.

2007-01-02 10:56:47 · 5 answers · asked by Andy 3 in Biology

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ok aliens......myth or reality?????

2007-01-02 10:54:56 · 11 answers · asked by Anonymous in Earth Sciences & Geology

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sigma notation?

write in sigma notation

-2+4-8+16-32+64

confused...
please tell me how to do it!!!

2007-01-02 10:54:53 · 6 answers · asked by rose64190 1 in Mathematics

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Kyushu, Japan, has large hunter spiders the size of a hand. They usually live in houses. What do they eat?

These do not build webs, and seem non-aggressive to humans.

2007-01-02 10:52:31 · 5 answers · asked by Martell 7 in Zoology

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Is Sebastian from the Little Mermaid a Lobster or a Crab ?

2007-01-02 10:52:28 · 13 answers · asked by leechie1899 1 in Zoology

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math questions?

1) For any number w, let w be defined by the equation #w#= -[w^2(w-1)]/ What is the value of -1?

2) IF a= -1 and b = -2 then 2a^2-2ab+b^2=

3) The lengths of the leg of right trinalge PQR are x and y. The lengths of the legs of right trinalge RST are 2x and 2y.
a)Find twice the area of PQR
b) Find the area of RST

2007-01-02 10:52:23 · 3 answers · asked by Jane A 3 in Mathematics

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what are some questions you have about the universe?

2007-01-02 10:51:54 · 3 answers · asked by Nick 1 in Astronomy & Space

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what are the operations with rational numbers(fractions)- the rules fro +,-,x and÷. ,give an example?

2007-01-02 10:50:47 · 4 answers · asked by bluedragon9081 1 in Mathematics

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What are the real-number roots of Ln(x)=1/Ln(x)?

I'm a bit doubtful. Am I suppose to multiply both side by Ln(x) and then square it? Then what am I suppose to the do with the "Ln" so that I get "x= the answer"? Please help me. Thanks.

2007-01-02 10:50:03 · 4 answers · asked by just_a_girl 2 in Mathematics

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i have some conceptual question on THE IDEAL GAS LAW AND KINATIC THEORY.?

1)A tightly sealed house has a large ceiling fan that blows air out of the house and into the attic. This fan is turned on, and the owners forget to open any window or doors. Wht happen to the air pressure in the house after the fan has been on for a while, and does it become easier or harder for the fan do its job? Explain.

2)Above the liquid in a can of hair spray is a gas relatively high pressure. The label on the can including the warnings “Do not store at high temperature”. Use the ideal gas law and explain why the warning is given.

3)Atmospheric pressure decreases with increasing altitude. With this fact in mind, explain why helium filled weather balloons are underinflated when they are launch from earth.

4)If the temperature of an ideal gas is doubled from 50to 100 degree C. does the average translational kinetic energy of each particularly double?

2007-01-02 10:49:34 · 1 answers · asked by krish s 1 in Physics

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Have they invented x-ray glasses?

Like those x-ray thingies in the hospital, can you buy glesses like that?

2007-01-02 10:49:10 · 6 answers · asked by Debbie_Blu 1 in Medicine

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Which of the following is a single replacement?

a. KOH + HCl ---> KCl + H20
b. 2Na + Zn(NO3)2 ---> 2NaNO3 +Zn
c. 2C2H6 +7)2 ---> 4CO2 +6H2O
d. H2O + CO2 ---> H2CO3

2007-01-02 10:49:03 · 4 answers · asked by Ryoma Echizen 3 in Chemistry