Science & Mathematics - 16 July 2007

2007-07-16 03:10:23 · 4 answers · asked by Anonymous in Mathematics

Factor

2007-07-16 03:09:48 · 3 answers · asked by Anonymous in Mathematics

Factor

2007-07-16 03:09:08 · 4 answers · asked by Anonymous in Mathematics

Last night I videotaped these fireworks:
http://weber.edu/WSUToday/062707pops2007.html

The edge of the campus of this university is 1.2 miles from my house. So that's the minimum possible distance to the school. They were launching fireworks straight up in the air. I video taped them from my back yard. The sound was ~2 seconds after the explosions.

Can sombody explain that?

2007-07-16 03:08:31 · 5 answers · asked by Anonymous in Physics

Factor

2007-07-16 03:08:23 · 3 answers · asked by Anonymous in Mathematics

2007-07-16 03:07:31 · 9 answers · asked by alister_gunning 2 in Engineering

1999 numbers are placed along the circumference of a circle. When any four successive numbers are added, the total is always 28. What are these 1999 numbers? Find all possible solutions.


* ADDITIONAL NOTE: I have a feeling that they are all 7... but I can't prove it... if you could, that would be a great help.

Thanks heaps guys... :)

2007-07-16 03:01:31 · 1 answers · asked by helpme.com 1 in Mathematics

What was the reason why it wasn't able to do its mission?

2007-07-16 02:59:13 · 2 answers · asked by always_blue 1 in Astronomy & Space

Sense it contains Hydrogen and Helium.

2007-07-16 02:58:52 · 10 answers · asked by Anonymous in Astronomy & Space

While runnin the marathon, Emily averages 10 min a mile for the first b hours where b <4.3. in terms of b, how much farther does emily have to run in order to complete the 26 mile race

a) 26 - 6b b) 26-600b c)6b-26 d) 26 - (6/b) e) 26 - (b/6)

2007-07-16 02:54:57 · 3 answers · asked by Anonymous in Mathematics

Question 53 1 points Save
Subtract the following polynomials: (-x2 + 5x) - (3x + 3 - 9x2)
6x2 + 2x - 3
8x2 + 2x - 3
-2x2 + 8x + 3
-4x2 - 2x + 3



Question 54 1 points Save
Multiply the following polynomials: 2p3(3p4 - 2p3 + 4p + 5)
6p8 + 3p7 + 4p5 + 5p4
6p7 - 4p6 + 8p4 + 10p3
5p8 + 6p5 + 7p4
6p16 - 4p12 + 18p4



Question 55 1 points Save
Multiply the following polynomials: 4c4(2c4 - 3c3 + 7c + 1)
8c8 - 12c7 + 28c5 + 4c4
8c8 + 2c7 + 7c5 + c4
6c8 + c7 + 11c5 + 5c4
8c16 - 12c7 + 32c4

Charlies Chocolates charges $12 for each pound of truffles plus $25 to deliver and include advertising for school fundraising. Write an equation in slope-intercept form that shows the total cost y for x pounds of chocolates.
x = 25y + 12
y = 12x + 25
y = 125x + 12
x = 12y + 25

2007-07-16 02:51:51 · 2 answers · asked by Anonymous in Mathematics

i need help.can u show me the steps please

2007-07-16 02:47:52 · 6 answers · asked by Anonymous in Mathematics

2007-07-16 02:44:39 · 5 answers · asked by Dodger 1 in Zoology

Considering the Fibonacci sequence satisfies the recurrence relation Fk = Fk-1 + Fk-2, for all integers k ³ 2. Whats an equation expressing Fk+3 in terms of Fk+2 and Fk+1

2007-07-16 02:43:28 · 2 answers · asked by Anonymous in Mathematics

i have always wondered but if any you scientists out there can tell me i would be greatfull

2007-07-16 02:39:18 · 13 answers · asked by Ball's Of Iron 2 in Astronomy & Space

2007-07-16 02:38:56 · 8 answers · asked by bee 1 in Mathematics

Water vapur drives a piston to accomplish work. What amount of work is done when 25.0 g of water at 373 K (100 degrees celsius) is vapourized to steam, pushing a piston against 1 atm of pressure?

nliqu=nvap= 25gX(1molH2O/18g)

delta volume= Vvap-Vliq

Vvap=nvapRT/P

W=(Pext)(deltaV)=nvapRT
=(25/18)molx8.31J/mol-kX373K
=4.30 kJ

Just don't get how they got W to equal to nvapRT...

2007-07-16 02:33:31 · 2 answers · asked by Christine 1 in Chemistry

I guessed 657nm. Was I right? The other options were 93.8nm, 434 nm, 487 nm, and 411 nm.

2007-07-16 02:32:37 · 1 answers · asked by Liz 4 in Chemistry

2007-07-16 02:30:25 · 1 answers · asked by Anonymous in Chemistry

2007-07-16 02:30:21 · 14 answers · asked by TheNewCreationist 5 in Biology

2007-07-16 02:23:57 · 5 answers · asked by Anonymous in Engineering

2007-07-16 02:21:59 · 5 answers · asked by tddmrk5 2 in Astronomy & Space

seems like such a short existence when you think about it, Am I retarded ?

2007-07-16 02:20:07 · 7 answers · asked by Anonymous in Astronomy & Space

2007-07-16 02:18:53 · 5 answers · asked by Russell2158 2 in Geography

2007-07-16 02:16:12 · 6 answers · asked by gawa 1 in Engineering

This is when the Earth aligns it's self in the center of the Milkyway. Both the Mians and Chinees profocies, say its the end of the world. Science says the poles will change and the conteneints will shift, thus close enough to it.
Forgive my spelling. I've been out of school to long.

What do you think???

2007-07-16 02:13:15 · 12 answers · asked by Christanti 3 in Astronomy & Space

2007-07-16 02:06:03 · 5 answers · asked by anne 3 in Chemistry

How can i assess their growth?

2007-07-16 02:03:11 · 1 answers · asked by are biyi 1 in Botany

Whats the four terms of the recursively defined sequence:
bk = bk-1 + 3×k, for all k ³ 2, b1 = 2.

2007-07-16 01:59:24 · 3 answers · asked by Anonymous in Mathematics

I'm having difficulty balancing this redox equation. please help me.

HgS(s) + NO^3-(aq) + Cl-(aq) -----> HgCl4^2- (aq) + NO(g) + S(s)

NOTE: this is in an ACIDIC medium.


thanks. 10 pts for the best answer.

2007-07-16 01:55:33 · 2 answers · asked by carbonara 2 in Chemistry