Science & Mathematics - 25 January 2007

2007-01-25 05:59:15 · 8 answers · asked by Anonymous in Earth Sciences & Geology

(a - b) (a + 3b)

2007-01-25 05:58:48 · 6 answers · asked by boboby c 1 in Mathematics

what is the constant of variation?

2007-01-25 05:57:18 · 2 answers · asked by smoovstella319 2 in Mathematics

2007-01-25 05:55:12 · 3 answers · asked by Anonymous in Astronomy & Space

2007-01-25 05:54:42 · 16 answers · asked by M H nock nock 1 in Botany

My child's third grade was asked: Would the footprints from 1969 still be on the moon? Explain. He wrote: No, because maybe a meteor came and wiped them away. His teacher said that was a "silly" answer.

2007-01-25 05:54:21 · 13 answers · asked by Carole S 1 in Astronomy & Space

how does it actually happen

2007-01-25 05:54:18 · 2 answers · asked by bullsi890 1 in Chemistry

I need this information for a science project for school, so I'd appreciate the help!
~Breena!~

2007-01-25 05:53:21 · 2 answers · asked by Aerwen Telcontar 1 in Other - Science

uggghhhh science lab what does this organization stand for?

2007-01-25 05:52:56 · 12 answers · asked by ♥ 2 in Earth Sciences & Geology

2007-01-25 05:52:46 · 5 answers · asked by Vicki H 1 in Engineering

The x-intercept of the line through the point (2,7) which is perpendicular to the line through the points (11,2) and (14,3) is:

a) A positive number
b) A negative number
c) zero
d) none of the above

First I found the slope for (11,2) (14,) m=1/3
then placed it in y intercept form. Then I got lost.


I think the answer is positive but I'm not sure if my work is correct.

Please help me.

2007-01-25 05:51:46 · 7 answers · asked by Shoe Girl 2 in Mathematics

I am puzzled! When I visit farms, there are usually about 30 chickens and only 2 roosters! Why is this?

2007-01-25 05:50:50 · 13 answers · asked by Anonymous in Zoology

Many industrial processes are not under equilibrium conditions- offer reasons why this so.

thank you.

2007-01-25 05:50:09 · 2 answers · asked by Anonymous in Engineering

Hi,I'm stuck on this question.Any help will do

Using industrial processes such as haber or contract process show how the concentration of products maybe maximised by altering the reaction condition.

thank you

2007-01-25 05:47:35 · 1 answers · asked by Anonymous in Engineering

Always a square or rectangular reflection of a window with frames around the panes as all. Why is that?

2007-01-25 05:46:23 · 2 answers · asked by punchpringle 2 in Physics

Arguing with my know-it-all sister

2007-01-25 05:45:47 · 8 answers · asked by Anonymous in Mathematics

2007-01-25 05:45:26 · 2 answers · asked by mel 1 in Engineering

2007-01-25 05:44:41 · 8 answers · asked by shakeel897 1 in Chemistry

2007-01-25 05:44:38 · 8 answers · asked by Anonymous in Weather

2007-01-25 05:44:29 · 7 answers · asked by joey k 2 in Zoology

For example: dogs, raccoons, and squirrels

2007-01-25 05:44:14 · 7 answers · asked by Anonymous in Zoology

2007-01-25 05:43:14 · 5 answers · asked by Anonymous in Physics

2007-01-25 05:41:13 · 5 answers · asked by Emperor Insania Says Bye! 5 in Physics

An 50 proof brandy is 25.0 (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in 7.0e+02 mL of brandy?

I have done many percent concentration problems, but this one has confused me. You don't have to do the problem for me, I just need some guidance on how to do it. If anyone could help, I would really appreciate it. Thank you.

2007-01-25 05:40:03 · 2 answers · asked by ash 1 in Chemistry

A reaction like the one we will observe today was carried out in a very efficient calorimeter (assume its heat capacity to be zero). A sample consisting of acid and base with a total mass of 98.0 grams gave a temperature rise of 3.52 oC. The number of moles of acid and base was 0.241 (equal moles of each component). What is the heat of neutralization per mole of acid (or base)?

I DO NOT want the answer. I need to know how you figure it out. I have tried various ways. I think i go wrong with the moles. Do i need use the moles of water formed or the solution? If so, how? The specific heat for the solutions is 4.10.

2007-01-25 05:38:38 · 2 answers · asked by Anonymous in Chemistry

a map or on Google Earth... There are two very prominent, roughly circle-shaped arcs of coastline, one in Horry County, South Carolina, and the other just north of it in Brunswick County, North Carolina. These are smooth, sandy beach areas. The coastlines to the north and to the south of these two arcs are very irregular and marshy.

There are also numerous "carolina bays" in both counties, which are unexplained, oval shaped indentations in the earth, ringed by sand ridges approximately 3-10 feet in height, and all oriented in a southeast to northwest direction.

I've heard that the two coastal arcs are merely tidally shaped features, but this strikes me as odd. Could the explanation be that they are really ancient impact craters from a meteor strike, wherein the meteor broke up into two large pieces and several hundred smaller pieces before striking the area? The smaller pieces might explain the carolina bays, and the two larger pieces might explain the two large beach arcs.

2007-01-25 05:38:14 · 1 answers · asked by I hate friggin' crybabies 5 in Earth Sciences & Geology

1. The most common type of volcanoes are also usually the smallest. ______________ produce a lot of ash, which often cools rapidly and forms a cone-shaped mass of rock made of hardened cinders and ash. The largest volcanoes are ________________, and are made almost entirely of lava flows. These low, broad volcanoes are typical of the ones found in Hawaii. The most violent explosions usually come from ____________________, which are made from alternating layers of cinder rock and hardened lava.

2. Vibrations caused by earthquakes can be measured by a ____________. Vibrations the earth's crust are also known as __________________ , which are produced during a earthquake. The point where the energy in an earthquake is first released is the ______________. The record that a seismograph makes is called a ___________________ and is made up of a series of zigzag lines.

2007-01-25 05:37:36 · 9 answers · asked by Anonymous in Earth Sciences & Geology

I've noticed that my girlfriend has a short quiver through her body just as she falls asleep. does anyone know the reason for that quik shake?

2007-01-25 05:37:23 · 8 answers · asked by ben b 1 in Biology

2007-01-25 05:37:07 · 3 answers · asked by Anonymous in Chemistry

2007-01-25 05:36:52 · 7 answers · asked by Emperor Insania Says Bye! 5 in Physics