Science & Mathematics - 14 December 2006

Note: the ^ means "to the power of." I am particularly wondering whether I should factor a difference of squares or a difference of cubes to start.

2006-12-14 13:14:14 · 5 answers · asked by Anonymous in Mathematics

List 5 reasons why the Bohr Model was wrong.
Thanks.

2006-12-14 13:13:27 · 4 answers · asked by Bobby Saggy 1 in Chemistry

I have noticed many layers in the snow and ice in one winter in my own back yard. Is it possible they are rushing to a conclusion because they want to be right about global warming? was there not catascrophic weather hundreds and thousands of years before automobiles?

2006-12-14 13:10:17 · 3 answers · asked by thomas s 1 in Earth Sciences & Geology

2006-12-14 13:09:28 · 9 answers · asked by resheda a 1 in Physics

2006-12-14 13:08:44 · 4 answers · asked by george h 2 in Mathematics

I have a couple questions that I'm stumped on. I'm supposed to solve these by using the completing the square method. However, some of these don't seem to work, but there has to be an answer and I don't know what I'm doing wrong. If any advandced algebra people could help me out and give me a detailed explanation, I'd bee really grateful. Ok so here are the problems.
1) p2 + 3p = 1
2) r2 + 5r = 2
3) t2 - 3t = -2
4) w2 - 8w = 3
5) x2 + 6x + 4 = 0
Yeah its just those five and the 2 next to the variables should actually be superscripted to be powers. Thanks!

2006-12-14 13:08:27 · 1 answers · asked by gotriceazn101 2 in Mathematics

2006-12-14 13:08:17 · 1 answers · asked by Anonymous in Chemistry

(a) The Amazon

(b) The Nile

(c) The Chiang Jiang

2006-12-14 13:08:06 · 17 answers · asked by kbj4391 1 in Geography

2006-12-14 13:07:46 · 8 answers · asked by sweet g 1 in Chemistry

2006-12-14 13:07:35 · 16 answers · asked by Anonymous in Astronomy & Space

Which of these DNA strands would the DNA strand TACGGCAA be paired with in a double-stranded DNA molecule?

a. TTGCCGTA
b. AUGCCGUU
c. GCATTACC
d. ATGCCGTT
e. TACGGCAA


please help me if you know the correct answer. i have no idea. =[

2006-12-14 13:07:30 · 8 answers · asked by JoAnna 2 in Biology

easy eh?

2006-12-14 13:07:05 · 6 answers · asked by kogmu 3 in Mathematics

If a final exam is worth 10% of ones grade, and one has so far a 75% in a class, then what percent must a person get on a final to get a 79% in a class?

2006-12-14 13:07:00 · 5 answers · asked by jon f 1 in Mathematics

1-Hypotheses may arise from:

A-prior knowledge
B-logical inferences
C-imaginative guesses
D-all of the above

2-Safety procedures are important when working:

A-in a laboratory
B-in the field
C-with animals
D-all of the above

3-The most abundant compound in most living things is:

A-carbon dioxide
B-water
C-sodium chloride
D-sugar

4-The repeated movement of water between Earth`s surface and the almosphere is called:

A-the water cycle
B-the condensation cycle
C-precipitation
D-evaporation

5-Nitrogen fixation is carried out primarily by:

A-humans
B-plants
C-bacteria
D-consumers

6-Which of the following is an organ of the digestive system?

A-stomach
B-nerve tissue
C-muscle cell
D-epithelial tissue





6-Prokaryotes lack:

A-cytoplasm
B-a cell membrane
C-a nucleus
D-genetic material

7-Which of the following is an example of an organ?

A-heart
B-epithelial tissue
C-digestive system
D-nerve cell

2006-12-14 13:06:48 · 20 answers · asked by Teresa 2 in Biology

2006-12-14 13:05:01 · 3 answers · asked by Anonymous in Chemistry

2006-12-14 13:03:30 · 3 answers · asked by alejandra611 2 in Geography

2006-12-14 13:02:14 · 5 answers · asked by Anonymous in Astronomy & Space

I know the derivative of sin is cos and so forth, but how do you handle a change in the argument? ex. y=cot(1-2(x)squared)

2006-12-14 13:01:22 · 3 answers · asked by Anonymous in Mathematics

2006-12-14 13:01:15 · 2 answers · asked by Anonymous in Astronomy & Space

Set C = {1,2,3,4,5}. if two distinct members of Set C are selected at random, and then the minute hand of a clock is moved to point at one of the members selected and the hour hand of this clock is moved to point at the other member selected, find the probability that the smaller angle formed by these two hands of the clock is acute. Express you answer as a common fraction reduced to lowest terms.

2006-12-14 13:00:59 · 3 answers · asked by Quagmire77 1 in Mathematics

2006-12-14 13:00:55 · 6 answers · asked by katiekcat5 3 in Mathematics

Does anyone know why it is that some dinosaurs grew to 50 feet and more, whereas almost all animals today are much smaller? Are we still "recovering" from the dinosaur extinction, and slowly progressing towards larger sizes?

2006-12-14 13:00:52 · 3 answers · asked by Leon M 2 in Zoology

Math.

2006-12-14 12:59:48 · 26 answers · asked by ViCTORiA <3 2 in Mathematics

(pyruvate) (an excessive amount of energy)

2006-12-14 12:58:19 · 2 answers · asked by lala haha gaga mama 2 in Biology

I'm writing a research paper on black holes, and have said that most people think that black holes exist... and I'm just wondering if this is true of the people on here.

So, do you think that black holes exist, and why?

2006-12-14 12:56:39 · 13 answers · asked by person 3 in Astronomy & Space

2006-12-14 12:56:12 · 13 answers · asked by Anonymous in Mathematics

2006-12-14 12:55:18 · 6 answers · asked by Anonymous in Astronomy & Space

Where is that place and what is it about? I'm just curious what you folks gonna find out!

2006-12-14 12:55:13 · 3 answers · asked by McMurdo 3 in Geography

2006-12-14 12:52:28 · 2 answers · asked by chicky monkey 1 in Chemistry

2006-12-14 12:52:10 · 3 answers · asked by Jujeaux 6 in Physics