Science & Mathematics - 24 December 2007

2007-12-24 09:53:43 · 5 answers · asked by Anonymous in Astronomy & Space

So I'd better go. Merry Christmas and see you after the sales.

2007-12-24 09:53:40 · 6 answers · asked by Anonymous in Astronomy & Space

I have a take home test and i would just like to be able to check a few of the answers that i'm unsure of

True or False- In a process called GLACIAL EROSION, the rocks dragge by glaciers produce grooves and scratches in bedrock?
(if false then make the sentence true by changing the word in capitals)

Granite Lasts a long time when it is used for building areas where the climate...
a.) does not have freezing and thawing
b.) is cool
c.) does not have acid rain
d.) is hot an rainy

Soil formation begins with the weathering of...
a.) litter.
b.) rock
c.) the A horizon
d.) humus

Removing nonrenewable resources such as iron and copper from the ground is called
a.) devlopment
b.) nutrient depletion
c.) silt
d.) clay

Mass movement is caused by...
a.) plucking and abrasion
b.) gravity
c.) chemical weathering
d.) erosion and deposition

2007-12-24 09:53:11 · 6 answers · asked by ohhlaalaa 2 in Earth Sciences & Geology

2007-12-24 09:50:42 · 8 answers · asked by Anonymous in Agriculture

2007-12-24 09:48:03 · 16 answers · asked by Anonymous in Biology

2007-12-24 09:47:34 · 4 answers · asked by paragon 1 in Chemistry

2007-12-24 09:38:35 · 9 answers · asked by Dr. Doom 2 in Astronomy & Space

I'm having a problem with this seemingly easy limit question:

find the limit of (x^2-3x+2)/(x^3-4x) as x approaches 2 from the right, as x approaches -2 from the right, as x approaches 0 from the left, and as x approaches 1 from the right

2007-12-24 09:32:12 · 5 answers · asked by Anonymous in Mathematics

Hydrochloric acid can be produced by reacting silicon tetrachloride with water. Silicon dioxide is also produced.

a. Write the balanced chemical equation for this reaction.
I wasn't sure on this, I actually wanted an example and explanation. I guessed: SiCl4 + H2O --> HCl + SiO2

b. Why would it be incorrect to write an ionic equation for this reaction? (I don't know why it's incorrect)

2007-12-24 09:29:12 · 3 answers · asked by ♥ 3 in Chemistry

2007-12-24 09:17:26 · 18 answers · asked by cheerychick 2 in Geography

2007-12-24 09:14:26 · 11 answers · asked by Anonymous in Mathematics

Jamie is looking to buy some caramel corn for gift baskets. She can get 4, 1/2 pound bags for the same price that she can get 5, 1/3 pound bags. What is the difference between the amounts she would get?

11/12 pound
1/3 pound
5/8 pound
1/5 pound

2007-12-24 09:07:30 · 7 answers · asked by sunny p 1 in Mathematics

If the universe goes on forever...what is beyond that? I know that nobody KNOWS this but could I get your opinions?

2007-12-24 09:05:16 · 41 answers · asked by Anonymous in Astronomy & Space

2007-12-24 09:02:30 · 14 answers · asked by Curlyc+ 3 in Astronomy & Space

At what feet are you no longer in earth but in space???

2007-12-24 09:01:48 · 11 answers · asked by Daniel S. 1 in Astronomy & Space

The following diagram is often used to illustrate one of the many proofs of the Pythagorean Theorem.

http://www.mathsisfun.com/geometry/images/pythagorean-theorem-proof.png

But first, I think a lemma needs to be proven showing that the construction is even possible, and specifically that the quadrilateral with sides of length "c" is indeed a square. It needs to be a square to prove the Pythagorean Theorem.

No website that explains the proof ever mentions the lemma. When is proving a lemma, first, necessary?

2007-12-24 09:01:40 · 3 answers · asked by Anonymous in Mathematics

2007-12-24 09:00:46 · 25 answers · asked by The Wail of a Banshee 7 in Astronomy & Space

A positive integer is perfect if it is the sum of all its positive factors except itself. There are two perfect integers less than 30. What are they?

Can you help?

Thank you.

2007-12-24 08:56:27 · 5 answers · asked by Anonymous in Mathematics

Erica was making cookies. The recipe called for 3/4 cups of sugar. Erica only has 1/8 cup of sugar. How much more sugar does she need?

3/4 cups
1/4 cups
5/8 cups
3/8 cups

2007-12-24 08:49:00 · 14 answers · asked by sunny p 1 in Mathematics

just thought you'd like to know

Merry Christmas

2007-12-24 08:47:18 · 12 answers · asked by Anonymous in Mathematics

i need to know, for some reason.
hahahaaaa. :]

2007-12-24 08:41:05 · 27 answers · asked by ~Pandi! 1 in Zoology

I need to know all of the organs that are located in each of the four quadrants (RUQ, LUQ, RLQ, and LLQ) of the human body. Thank you in advance!

2007-12-24 08:40:08 · 4 answers · asked by Anonymous in Biology

Did they need to adjust it at all? My book says the uncertainty of the speed of light is 0. I find it hard to believe that the standard meter was exactly 1/299,792,458th already.

Was an adjustment of a few nanometers in one direction or the other required?

My brother wants to know, also.

2007-12-24 08:38:40 · 5 answers · asked by Anonymous in Physics

2007-12-24 08:37:43 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Whats the difference, and also I want to work with the digestive system, so which one would I want to be?

2007-12-24 08:37:24 · 5 answers · asked by marchingxsnare 1 in Medicine

well i drink 5 or 6 a day maybe 7

2007-12-24 08:37:21 · 9 answers · asked by Anonymous in Biology

2007-12-24 08:36:55 · 8 answers · asked by Anonymous in Physics

What happens to the voltage and current when you have two sources in series, and one of them is reversed. Why.

I really don`t understand this, I would really appreciate if someone could explain it to me.

2007-12-24 08:36:37 · 3 answers · asked by Anonymous in Physics

Two small blocks each of mass M, are connected by a string of constant length of 4h and negligible mass. Block A is placed on a smooth tabletop, and block B hangs over the edge of the table. The tabletop is a distance 2h above the floor. Block B is then released from rest at a distance h above the floor at time T=0.

Q's:

Determine the acceleration of block B as it descends.

Block B strikes the floor and does not bounce. Determine the time at which block B strikes the floor.

There are many more questions but I do not understand the ones above. Please help :)

2007-12-24 08:34:01 · 2 answers · asked by Anonymous in Physics

whos going to be looking for mars in the sky tonight? its going to be the closest its been in the last 60,000 years.

2007-12-24 08:33:12 · 12 answers · asked by Doctor Jones 2 in Astronomy & Space