Science & Mathematics - 27 October 2007

Find the coordinates of it's reflection accross the x-axis, the y-axis, and the origin.

(-8/9, sqrt(17)/9)

2007-10-27 10:14:23 · 3 answers · asked by Epic M 1 in Mathematics

2007-10-27 10:12:22 · 4 answers · asked by Doc Holiday 1 in Biology

In a DNA double helix, a region along one DNA strand has this sequence of nitrogenous bases: TAGGCCT. What is the base sequence along the other strand of the molecule?

2007-10-27 10:11:45 · 4 answers · asked by Doc Holiday 1 in Biology

hey, i think i have the answer to this question. i just want to be sure.

it says to simplify
(2h-6)^3

thanks!

2007-10-27 10:11:34 · 4 answers · asked by Anonymous in Mathematics

My daughter has to build an octohedral model for Chemistry class. She will use plastic, styrofoam and paint.

Has anyone every done this before and do you have any suggestions?

2007-10-27 10:07:42 · 2 answers · asked by Stareyes 5 in Chemistry

2007-10-27 10:05:18 · 1 answers · asked by Anonymous in Chemistry

just curious.

2007-10-27 10:04:30 · 9 answers · asked by Anonymous in Zoology

Given that f(x)= 2x^2+3x-20/ x+4 , find the value(s) of the "x" causing f(x) to be discontinuous and the limit of f(x) as X approaches these value(s)


thanks guys for your help!

2007-10-27 10:03:34 · 4 answers · asked by jasmine 2 in Mathematics

Can you mix it with water or not.

2007-10-27 10:02:15 · 1 answers · asked by John R 4 in Chemistry

I need 2 know the opposite of benefit for my science project

2007-10-27 10:00:50 · 9 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-27 09:59:59 · 1 answers · asked by Terri L 2 in Biology

After adding more salt, and stirring it, you notice some salt is sitting on the bottom of the glass.

a) Is this salt-water combination a mixture, solution, suspension, or emulsion?

b) Explain why no more salt will dissolve in the water.

c) What could you do to this same glass of water to get more salt to dissolve?

d) If you put this glass of salt-water into the freezer, what would you expect to happen to it? (sorry, just saying it will freeze is not enough)

2007-10-27 09:56:25 · 1 answers · asked by tia 3 in Chemistry

I'm a grade nine student in an advanced math program, working at (I think) a grade 10 academic level. We're doing radicals and exponents, and I understand the basics of both, I just have troubles with harder questions. For example:
SIMPLIFY
4*(square root of 2)*([square root of 2]+[square root of 18])
According to my teacher and the answers in the back of my math textbook the answer to this question is 32? Could anybody explain this and just give me any help you can on exponents and radicals in general? And PLEASE don't use really confusing words, or terms, or anything - I just started this unit and I'm really lost, fancy mathematical terminology really won't help.

2007-10-27 09:54:43 · 6 answers · asked by ? 3 in Mathematics

You weight 625 N on earth. What would you weight on Venus? Venus' mass is 4.88 x 10^24 kg and it has a radius of 6.07 x 10^6 m.

2007-10-27 09:54:06 · 1 answers · asked by ? 2 in Physics

I need it for a science project, nd I do not fully understand the problem for the science project.

2007-10-27 09:50:29 · 1 answers · asked by John R 4 in Chemistry

by looking at the structurual formula of a b vitamin, how would you be able to tell it is one. in other words what do all b vitamins have in common based on structual formula?

2007-10-27 09:50:09 · 1 answers · asked by ladygem 1 in Chemistry

erent about them?

#3: are the continents moving?
why or why not?

#4:what happens at plate boundaries?

#5:how and where do the earthquakes happen?

#6: who is alfred wegener and what teory did he share with the scientific world?

(you can answer only one to^^ just at the answer, please write what #it is)

2007-10-27 09:49:48 · 4 answers · asked by Anonymous in Earth Sciences & Geology

okay, so the function is f(x) = 3x^2 - 5x + k

a) write down f '(x)

The equation of the tangent to the graph of * f * at x=p is y=7x-9. Find the value of:

b) p

c) k

2007-10-27 09:49:34 · 2 answers · asked by Anonymous in Mathematics

A long with the rest of the cell in the plant cell stuff?

2007-10-27 09:49:18 · 1 answers · asked by Moony 2 in Biology

2007-10-27 09:48:31 · 1 answers · asked by Anonymous in Physics

2007-10-27 09:47:03 · 3 answers · asked by amakram 1 in Earth Sciences & Geology

2007-10-27 09:46:51 · 20 answers · asked by george b 1 in Earth Sciences & Geology

By "straight line", I mean on a great circle on the seas of Earth, so that the ship travels steady dead straight ahead at all times. How far can a ship go without making landfall? Let's assume that the ship is self-powered and has adequate fuel.

2007-10-27 09:45:57 · 5 answers · asked by Scythian1950 7 in Geography

2007-10-27 09:45:41 · 3 answers · asked by Anonymous in Mathematics

Am I right for the followings?

1) The area of a triangle is 384 square feet. If its base is 8 feet longer than its altitude, find the length of the base and the altitude.

For this one I got: Length= 29, Altitude= 21.

2) Find two consecutive even integers, whose product is 1224.

For this one I got: x = 34 and 36, -34 and -36.

3) One number is 9 less than the other. Find the two numbers if their product is 736.

For this one I got: x = 23, -32

4) 3x - 6 = 0

For this one I got: x = 3, 2

5) | 3x - 6 | = 0

For this one I got: x = 2, -2

6) | 3x - 6 | > 0

For this one I got: x > 2 or x < -2


Thank you so much. I appreciate it.

2007-10-27 09:41:05 · 5 answers · asked by Anonymous in Mathematics

Proportions, 2 step equations and more

2007-10-27 09:40:23 · 5 answers · asked by Sami:) 1 in Mathematics

Also for 27.1g of ntrogen monoxide. The questions come from introduction to chemistry 2nd edition by nivaldo j tro. I know the answers are .945 and .903 moles, but I want to know how to set up the equation.

2007-10-27 09:39:57 · 3 answers · asked by Anonymous in Chemistry

Red phosphorus.

2007-10-27 09:35:10 · 1 answers · asked by blueanswers 2 in Chemistry

about physics

2007-10-27 09:32:19 · 2 answers · asked by Anonymous in Physics

2007-10-27 09:30:04 · 3 answers · asked by Easton M 2 in Chemistry