Science & Mathematics - 23 September 2007

the depth y metres of water in a harbour is given by the equation: y = 10 + 4sin(t/2)

a) calculate the depth of the water when t = 2

2007-09-23 08:26:31 · 2 answers · asked by Anonymous in Mathematics

How many years will it take to exhaust an IRA of $210000 if you withdraw $1800 every month?
Assume a rate of interest of 7% compounded monthly.

2007-09-23 08:22:33 · 2 answers · asked by Adawg 3 in Mathematics

how do u do absolute vaulue on a CASIO graphing calculator?

2007-09-23 08:20:00 · 2 answers · asked by Anonymous in Mathematics

There are 3.29 g of iodine-126 remaining in a sample originally containing 26.3 g of iodine-126. The half life of iodine-126 is 13 days. how old is the sample?

2007-09-23 08:16:35 · 7 answers · asked by sillylilchalupa 1 in Chemistry

semiannually math

2007-09-23 08:13:34 · 11 answers · asked by Anonymous in Mathematics

The second law of thermodynamics stated that everything is headed for entropy. Therefore whatever you create will be of a lower form of order. Which then beggs the question: Should you create nothing in order to preserve, or is your version of order an important part of chaos.

2007-09-23 08:13:23 · 2 answers · asked by Kelly 3 in Physics

2007-09-23 08:10:58 · 6 answers · asked by lexie 4 1 in Biology

what is important to remember when multipling/ dividing positive and negative numbers? and ... what is impotant to remember when adding/ subtracting positive and negative numbers? i really need help with my math lol =]

2007-09-23 08:10:43 · 4 answers · asked by =] 2 in Mathematics

How can I protect myself.

I like em
JUst can't get em,

2007-09-23 08:09:48 · 17 answers · asked by Anonymous in Astronomy & Space

2007-09-23 08:07:35 · 10 answers · asked by dinerdawn34 1 in Astronomy & Space

HNO3(aq) + H2O(l) -> ___(aq) + NO3-(aq)
What compound is needed to fill in the blank?

I have already tried H3O and H3O+ but the problem won't accept my answer

2007-09-23 08:06:50 · 2 answers · asked by beeboroachgoingon197 1 in Chemistry

How do you find the midpoint of QR when Q is (-1,4) and R is (8,2)
Help please!!! I'll be forever grateful!

2007-09-23 08:06:19 · 11 answers · asked by SecretlyInLove 2 in Mathematics

2007-09-23 08:05:35 · 10 answers · asked by Carolyn H 1 in Zoology

2007-09-23 08:02:36 · 23 answers · asked by Anonymous in Astronomy & Space

http://theflatearthsociety.org/forum/index.php?PHPSESSID=bd33d1449257cc85ae5e89c581c977c7&board=12.0

I have found this site, and some things about this organization.
I know that the world is round. Normaly, you have to be a total idiot to think the world is flat!

Do you think the world is flat or round?

I do not think the world is round, I know it!

2007-09-23 08:01:22 · 17 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-23 08:00:40 · 2 answers · asked by damigurl05 1 in Biology

does anyone know what would happen if u pour 20 gallons of liquid nitrogen into 20 gallons of magma?ive been wondering for sometime now.and if u no a site that gives a brief explaination please tell me.and finaly please give me a good explaination and if scientist have tried.ohh and if u send anything dumb for points ill vote u down.

2007-09-23 08:00:19 · 5 answers · asked by reinhart_fagel 1 in Earth Sciences & Geology

the ghost of the meadow

a fiend, a faun, a road through the willows, a sky broken by rain
a song sung across a misty meadow, Lord, Lord won't you help me
I followed the call of that voice full of sorrow, and I'll tell you what I did see
a house made of mud by the shores of a river, a shroud of linen white and clean
dressed all in black was the girl with the yellow eyes, cloudy, and lost in a dream
and holding her babe close in her arms she sang "don't leave me now, don't leave me, not after what's become of me
my man lies bleeding far away from here, he left me and went 'cross the sea, and only returns as a vision to me
can you save me from my destiny, and carry me far from here?
I'll go to him, I'll go to him, and he shall know that it's me"
across the meadow, over mosses and sedges, I carried the girl and her babe
but when we came to the edge of the forest, they turned and looked at me
across the face of the girl and her daughter came horror and sorrow and tears

2007-09-23 07:57:51 · 12 answers · asked by Anonymous in Paranormal Phenomena

2007-09-23 07:47:26 · 9 answers · asked by Anonymous in Engineering

I've heared all these stories about the government doing experoments on the weather do any of you guys know anyting about this i suspect the government is up to something.

2007-09-23 07:46:42 · 3 answers · asked by Mr. Anderson 3 in Weather

In triangle ABC, m a.) Find sin A to the nearest ten-thousandth
b.) Find the measure of angle A

how do i find these, please show me how

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okay im still a little lost
i did sin^-1 = 20/40 and the answer i got was 30
so is that answer what b?
if it is for b(the measure of angle A), then what is a(sin A)

2007-09-23 07:46:24 · 3 answers · asked by Anonymous in Mathematics

2007-09-23 07:46:11 · 1 answers · asked by 1Da 2 in Chemistry

Perform the indicated operations: (x2 – 11x + 4) – (-2x2 + 2x – 6) – (x2 + 6x – 5)

2007-09-23 07:44:56 · 11 answers · asked by sara 1 in Mathematics

For f(x) = 9x – 2, find f(-3)

2007-09-23 07:44:13 · 5 answers · asked by sara 1 in Mathematics

Sound travels at a speed of 340 m/sec. The lowest pitch a human can hear is about 20 Hz. How long is the wave length of a 20 Hz sound wave? Show the set up with units. Please answer this, I really need help.

2007-09-23 07:43:47 · 3 answers · asked by ... 2 in Physics

I need serious help=(

2007-09-23 07:40:56 · 4 answers · asked by Anonymous in Mathematics

I have two balls, one being a normal bouncy ball and another looking exactly like it (shape, weight, texture, color, etc.) although does not readily transfer its energy thereby not bouncing. Is it possible for this second ball to still be of a rubber material?

2007-09-23 07:40:43 · 5 answers · asked by Tim W 2 in Other - Science

2007-09-23 07:37:55 · 7 answers · asked by Anonymous in Zoology

Are sites like www.unifiedintention.com and www.theintentionexperiment.com realistic. Is there really a "Secret"

2007-09-23 07:37:45 · 1 answers · asked by mtheoryit 1 in Astronomy & Space

2007-09-23 07:37:24 · 3 answers · asked by iuaeauaeo 2 in Earth Sciences & Geology