Science & Mathematics - 28 October 2007

2007-10-28 12:29:22 · 2 answers · asked by TicToc.... 7 in Astronomy & Space

This is a math question that my dad bet me no one will know. Prove him wrong please!!

2007-10-28 12:28:54 · 4 answers · asked by bradenshaffer 1 in Mathematics

x - 3 = sqrt(x - 1)

2007-10-28 12:27:05 · 3 answers · asked by Anonymous in Mathematics

2007-10-28 12:25:59 · 11 answers · asked by Anonymous in Zoology

2007-10-28 12:25:58 · 4 answers · asked by Anonymous in Medicine

Moving in the same direction at 20 cm/s. Find the velocity of the object which is slower after the collision. Answer in units of cm/s.

2007-10-28 12:23:40 · 1 answers · asked by mira s 1 in Physics

hi im a freshman in high school who needs help with this math. can someone help me answer these questions?

Solve each formula in terms of the given variable
1. 3n-t= s;t

2. b+3/e=f/2;e

3. w=2xyz; y

4. k=3mh+3;h

5. ab=6+cd; a

6. 2a+4b=d;b

7. 4xy+3=5z; y

8. -2(3a-b)=c;b

2007-10-28 12:19:30 · 3 answers · asked by Anonymous in Mathematics

okk i know the answer to this question, but how do you exactly solve it? How do you find the value of x?

4 = 2x +2

2007-10-28 12:18:36 · 36 answers · asked by Sarah B 1 in Mathematics

2007-10-28 12:18:04 · 1 answers · asked by angela m 1 in Astronomy & Space

2007-10-28 12:17:55 · 1 answers · asked by Anonymous in Biology

x^3 - 2x^2 = 63x

2007-10-28 12:17:14 · 3 answers · asked by Anonymous in Mathematics

Ok, what kind of spider is this? If it helps I live in Southern Idaho, this spider is probably about the size of a dime and when you approach it, it almost looks like it wants to stand up.
Link to Picture >>>> http://i30.photobucket.com/albums/c322/LisaDaisy36/spider.jpg

Thanks!!!!!

2007-10-28 12:13:09 · 5 answers · asked by lisadaisy36 3 in Zoology

81(3/2)

2007-10-28 12:13:04 · 2 answers · asked by Lu Y 1 in Mathematics

graph y < |1/2x – 4| + 3. Label the vertex and 2 symmetric points.

2007-10-28 12:11:06 · 1 answers · asked by San Fran Kid 2 in Mathematics

A solution contains 0.405 g of oxalic acid, H2C2O4.2H2O, in 500 mL. What is the molarity of this solution? What is the normality of this solution with respect to the following reaction:
H2C2O4 (aq) + 2NaOH (aq) --> Na2C2O4 (aq) + 2H2O (l)

2007-10-28 12:10:41 · 1 answers · asked by Anonymous in Chemistry

Solvent: para-dichlorobenzene
Freezing point of pure solvent: 53.02 C
Mass of unknown substance: 2.04 g
Freezing point depression constant: 7.1 C/m
Mass of para-dichlorobenzene: 24.80 g
Freeezing point of solution: 50.78 C

Calculate molar mass of solute??

I got something in the 200s...

2007-10-28 12:10:23 · 1 answers · asked by Bao Pham 3 in Chemistry

2007-10-28 12:09:16 · 2 answers · asked by sknw2004 1 in Mathematics

5/ y - 2 + 2/ y + 2

2007-10-28 12:08:51 · 3 answers · asked by Pep C 1 in Mathematics

Sodium carbonate is a reagent that may be used to standardize acids. In such standardization, it was found that a 0.302 g sample of sodium carbonate required 25.4 mL of a sulfuric acid solution to reach the end point for the reaction:
Na2CO3 (aq) + N2SO4 (aq) --> H2O (l) + CO2 (g) + Na2SO4 (aq)
What is the molarity of the H2SO4? What is the normality of the H2SO4?

2007-10-28 12:08:22 · 1 answers · asked by Anonymous in Chemistry

When the sale was 0.25 finished, Class A turned in $26.92. When the sale was half over, Class B turned in $38.25. Class C turned in $62.38 when the sale was 0.75 finished. Assuming that each class continues to sell candy bars at these rates, how much money will be raised by the sale??...Please explain how worked

2007-10-28 12:08:05 · 1 answers · asked by ilovebasketball 2 in Mathematics

(a) without ATP
(b) without CO2
(c) without oxygen
(d) without bacteria

2007-10-28 12:05:27 · 6 answers · asked by Anonymous in Biology

x^2 - 9
5x + 15

2007-10-28 12:03:43 · 2 answers · asked by Pep C 1 in Mathematics

Suppose your laboratory instructor inadvertently gave you a sample of KHP that was contaminated with NaCl to standardize your NaOH. How would this affect the normality you calculated for your NaOH solution?

2007-10-28 12:03:10 · 2 answers · asked by Anonymous in Chemistry

I'm getting so frusterated. An alarm clock at my house was an hour behind and then my cell phone was also. Both are supposed to reset automatically, the cell phone in time zones, the alarm clock in cases like this. Someone help me out there When is daylight savings time over?

2007-10-28 12:01:25 · 4 answers · asked by katesmit216 2 in Earth Sciences & Geology

It must be ladybugs as they are BUGS!!!!! right? My friend is convinced its ladybird.

2007-10-28 12:01:17 · 14 answers · asked by Helios64 1 in Zoology

i heard it is called inverter.i can not find it in the internet.maybe someone has got an internet address of any shop.i need more information about it.is it safe for tools to use it with inverter in Europe?i want to buy tools here because it is much cheaper.

2007-10-28 11:58:45 · 3 answers · asked by Anonymous in Engineering

PLEASE TRY!, to awnser ANY of the questions below.
~What factors cause leaves to change colors.
Where do these colors come from?
~What are the names of the specific chemical pigments that cause the colors we see (reds, yellows, purples, browns, greens etc.) These are the same pigments (chemical that causes color) that give fruit their different colors.
~What is the process (how it happens) that cause leaves to fall off of the branches. Explain at the cell level. (picture)

Please try to awnser. Thanks.

2007-10-28 11:58:25 · 3 answers · asked by jodles 1 in Botany

Yes, this is part of my homework. I've never been good at it, but I am trying. This question really floors me. When I think of all possible shapes, I can't imagine this being even remotely possible at all. However, I don't want to overlook anything.

Please provide your input. I don't believe it is possible, not without the shapes being identical. If you have a different perspective, please do share.

2007-10-28 11:54:22 · 7 answers · asked by Mike's Girl 3 in Mathematics

2x - 3y= 2
-5x + 2y= -16

and

3x + 5y= -19
5x - 2y= 20

it says to find the values of x and y.
i tried doing the first set and got -2 for x and y, when i put it into the computer it said that was wrong, so i was to frustrated to even attempt the second problem.

2007-10-28 11:52:14 · 7 answers · asked by Lilly 2 in Mathematics

Okay I have homework for Science and they are asking me to give them the average. My set of data had three trials and at the end I have the average of all three of the trials. Do I add all of the numbers plus the average and then divide it by 3 or 4? thanks....

2007-10-28 11:50:40 · 3 answers · asked by Anonymous in Mathematics