Science & Mathematics - 29 October 2007

We did a flame test on ions to determine the identity and i have no idea what this means.

2007-10-29 12:32:29 · 1 answers · asked by azncatgirl 2 in Chemistry

If a spider fell to the bottom of a 50-foot well, and each day climbed up 3 feet and slipped back 2, how many days would it take the spider to get out of the well?

2007-10-29 12:28:40 · 14 answers · asked by Axis Flip 3 in Mathematics

I went to put a glass in the microwave the other day and my husband stopped me saying that you can't put glass in a microwave as the glass will explode. I find it hard to believe that in 7 years of owning a microwave I have never put a glass in there so I am thinking I must of in the past but it didn't explode. Does anyone know the right answer?

2007-10-29 12:27:33 · 4 answers · asked by Anonymous in Physics

What would be the first derivitive of y = tan^2(5x) ?

2007-10-29 12:24:47 · 2 answers · asked by Paddy Disaster 1 in Mathematics

I'm doing an assignment on radio activity so i need to know 3 benefits can you help me with it?

2007-10-29 12:22:49 · 4 answers · asked by highToke 1 in Chemistry

Problem:
2/5(2y+1)=y-3
i can't figure it out. please help me.....

2007-10-29 12:21:05 · 16 answers · asked by daniella26 2 in Mathematics

plz help me i have no clue i had put 11 over 3 11/3 but i got it wrong so whats the answer then?

2007-10-29 12:19:37 · 4 answers · asked by ♥ Vannie♥ 3 in Mathematics

i used to think it was because we were hungry but my stomach it grumbling and i just ate dinner.

what is going on inside our stomachs when it grumbles?

2007-10-29 12:17:20 · 3 answers · asked by Anonymous in Biology

help me i dont understand it
tundra
vegetion what is it for tundra

physical location what is it for tundra

relative location what is it for tundra

average temperate what is it for tundra

precipitation what is it for tundra


the same for ice cap,highland,steppe,desert,
Mediterranean,humid subtropical,marine west coast,humid continental,tropical rain forest and tropical savanna


thank you

2007-10-29 12:11:07 · 2 answers · asked by Chris C 1 in Geography

Does anyone know the coefficients in the equation-
-10c-6+c?
Also..
what is a irrational and rational number? example please.
please explain.

2007-10-29 12:06:04 · 5 answers · asked by Shannon 3 in Mathematics

2007-10-29 12:03:56 · 20 answers · asked by Alex!!!!! 1 in Mathematics

a rich man gave away money as follows. He gave one fourth of the money to the salvation army. Then he gave one third of what he had left to the local library. Then he gave one half of the remaining money to a university. He gave the last 16000 to a home for the aged. how much money did he have in the beginning? Please explain work so i understand how you do the problem!

2007-10-29 12:02:21 · 7 answers · asked by Anonymous in Mathematics

What impact could genetic engineering have on the issue?

2007-10-29 12:02:19 · 2 answers · asked by Anonymous in Biology

A circle of unknown radius has a chord of length d whose midpoint is 1 foot from the circle. Find the radius, r, of the circle [in inches].

2007-10-29 12:02:04 · 2 answers · asked by Anonymous in Engineering

please help i need the answer

2007-10-29 11:59:54 · 12 answers · asked by ladyhornsdatswuzup 1 in Mathematics

2007-10-29 11:58:45 · 13 answers · asked by Chichiri 1 in Paranormal Phenomena

2007-10-29 11:54:49 · 6 answers · asked by Anonymous in Mathematics

2007-10-29 11:54:41 · 4 answers · asked by Lianna 1 in Mathematics

2007-10-29 11:50:57 · 7 answers · asked by Anonymous in Mathematics

2007-10-29 11:44:39 · 4 answers · asked by kelseywelsey94 2 in Astronomy & Space

Two objects of masses m and 4m are moving toward each other along the x-axis with the same initial speeds v0 = 45.0 m/s. The object with mass m is traveling to the left, and the object with mass 4m is traveling to the right. They undergo an elastic glancing collision such that mass m is moving downward after the collision at right angles from its initial direction.
(a) Find the final speeds of the two masses.
(b) What is the angle from its initial direction of motion at which the mass 4m is scattered?

2007-10-29 11:44:28 · 1 answers · asked by Anonymous in Physics

2007-10-29 11:44:05 · 5 answers · asked by kelseywelsey94 2 in Astronomy & Space

rocket launched upward with initial speed of 50m/s and constant acceleration of 2m/s2 with altitude of 150 m

2007-10-29 11:39:53 · 1 answers · asked by Don 1 in Physics

0.12 and -0.17 I think it's rational, seeing as it's higher than 0, but clarification is appreciated.

2007-10-29 11:35:21 · 8 answers · asked by Selene 1 in Mathematics

I'm not understanding this derivative crap at all, why did they ever make it?

a. Use the definition of the derivative to find f'(x) if f(x) = 4/x when x = 8

b. Find the left and right hand derivatives of f(x) at (1,4) if

f(x) = (x^2 + 3x, x >1) and (x^3 + x^2 + x + 1, x =< 1)


c. Find the equation of a line normal to f(x) if f(-2) = 6 and f'(-2) = 2/3


Thanks guys for all your help!

2007-10-29 11:34:15 · 2 answers · asked by skullz3200 1 in Mathematics

Any other information about these manufacturers around that time period would be greatly appreciated. Many thanks.

2007-10-29 11:33:55 · 2 answers · asked by Anonymous in Astronomy & Space

2007-10-29 11:29:32 · 10 answers · asked by Anonymous in Mathematics

6 /166

2007-10-29 11:27:49 · 10 answers · asked by Tiffany P 1 in Mathematics

Also are they considered to be economical.

2007-10-29 11:26:13 · 8 answers · asked by Anonymous in Engineering

6/166=

2007-10-29 11:24:44 · 4 answers · asked by Tiffany P 1 in Mathematics