Science & Mathematics - 22 July 2007

quarter century?

2007-07-22 12:48:59 · 3 answers · asked by Anonymous in Earth Sciences & Geology

this is a really philosophical question and really complicated too. me and my friends thought of this just talking. we have things like the speed of sound, light, and other stuff like that, but what is the speed of time?

2007-07-22 12:47:28 · 14 answers · asked by spiffwalker 2 in Physics

2007-07-22 12:46:45 · 3 answers · asked by Anonymous in Zoology

2007-07-22 12:46:34 · 2 answers · asked by melissa s 1 in Mathematics

If a doctor's offices is going to drug test (doing a urine analysis) is if figured out differently than how it is done at a place that drug tests for probations? Just wondering, thanks.

2007-07-22 12:45:32 · 2 answers · asked by pditty 3 in Medicine

2007-07-22 12:40:29 · 17 answers · asked by Kurt L 1 in Astronomy & Space

x² -6x = 216

I know how to factor it's just that 216 is a big freaking # I can't break it down, and even more harder is when I ever I get a number that matches I need to subtract so I can get "6" IMPOSSSIBLE!

2007-07-22 12:39:59 · 5 answers · asked by Anonymous in Mathematics

solve by completing the square??
x^2+8x=9

im stuck on this problem someone please help

2007-07-22 12:34:58 · 14 answers · asked by jesis332 1 in Mathematics

quack quack

2007-07-22 12:34:54 · 3 answers · asked by Anonymous in Zoology

I got my girlfriend a beautiful fishscale flower pin, but she wont use it because "they had to kill fish to get the scales". This became a long arguement that is still unfinished and one point I want to make is that it's like plucking a feather from a bird or plucking hair from something/somebody(although that is still painful, you don't need to kill to do it). Now wether or not they did that to get the scales isn't the point, it doesn't matter. What I need to know, though, is if the scales are similar to the feathers of a bird. So are the scales the 'skin' or do they have more flesh. If you have anything else I can say to help prove my point, that would also help.
P.S. She's wants to be a vegetarian, so ya, she's really against animal violence and all. Like I told her how humans are meant to eat meat as well as plants, so we are meant to kill, which in other words would say its ok to get the scales. Afterall you could take the scales and then just eat the fish. Thanks for all help

2007-07-22 12:34:29 · 7 answers · asked by demonintheshadows666 2 in Zoology

Q: A weight hangs from the end of a spring at its rest position. The weight is then pulled down 4 inches and released. The subsequent motion of the weight is given by an equation of the form
y = AcosBt,
where t represents time in seconds and y is the displacement in inches of the weight relative to the rest position. Find A and B if the time at which the weight first returns to the rest position is t=2.


I am able to find A, but I don't know how to find B. I came up with 2pi/3, but the correct answer is pi/4. I don't understand how this is reached. Can someone please explain to me how to answer this? Thank you very much.

2007-07-22 12:32:28 · 1 answers · asked by cac_424 1 in Mathematics

I have been trying to figure this one out for a while. A month ago we went fishing and the part of the river we were fishing looked like it was flowing upstream. I know this has to be impossible since water will only travel downhill due to the forces of gravity. And it was obvious that the direction that the water was flowing towards was higher in elevation. So how else might this be explained?

2007-07-22 12:32:13 · 11 answers · asked by victoryedge 2 in Earth Sciences & Geology

Find ALL the solutions to the following then draw them on the unit circle:

tan(x) = -3.4076 on the interval [0,2Pi)

2007-07-22 12:31:13 · 3 answers · asked by francis r 1 in Mathematics

Determine the cost for a 5 foot wide border for each material.
Be sure to provide explanations (the why) for your
answers. Cement costs $6.00 per square foot
installed. Outdoor carpet costs $ 5.00 per square foot
plus $10.00 per linear foot (perimeter) for edging,
Brick costs $8.00 per square foot plus a one time
$60.00 delivery charge.

2007-07-22 12:29:24 · 2 answers · asked by Anonymous in Mathematics

Is there a way to make sea water into healthy drinking water.

2007-07-22 12:27:07 · 6 answers · asked by Michael A 2 in Earth Sciences & Geology

A={2,4,b,d}

2007-07-22 12:25:29 · 2 answers · asked by big red 1 in Mathematics

Find the zeros of this function f(x)= x^3-4x^2-25x+100

2007-07-22 12:25:28 · 2 answers · asked by oscarjr1990 2 in Mathematics

2007-07-22 12:24:34 · 12 answers · asked by Travell B 1 in Mathematics

Also, how many Earth-like planets are there in the universe? I know they are very rare but even if they are wouldn't there still be millions of them in the universe?

2007-07-22 12:24:10 · 13 answers · asked by Anonymous in Astronomy & Space

A rectangular solid has a base with length 10 cm and width 5 cm. If the volume of the solid is 150 cm3, find the height of the solid. [Hint: The volume of a rectangular solid is given by V = LWH.]

2007-07-22 12:23:48 · 3 answers · asked by Anonymous in Mathematics

I used to think it was the gravitational force of the earth, but I just read that it is from the decay of radioactive material? What do you think?

Please...educated answers only.

2007-07-22 12:21:45 · 7 answers · asked by justask23 5 in Earth Sciences & Geology

x=2 y=5 z=1 a=6
1. x+y(z-y)
I got 27
prblem 2.
a(x)-z+y{-a-y}=
I got 16
I dont know if either are right but please odnt give me the answer please just tell me how to correct the problem or what I did wrong!
P:S I am not cheatig my tutor knows I try to see if my answers are corect online =p

2007-07-22 12:20:48 · 6 answers · asked by Kiana 3 in Mathematics

2007-07-22 12:19:25 · 3 answers · asked by Anonymous in Mathematics

2007-07-22 12:19:09 · 12 answers · asked by foxygoldcleo 4 in Astronomy & Space

x - 5 < 3

AND

2x + 7 > 5

thank you SO much!

2007-07-22 12:19:01 · 2 answers · asked by Anonymous in Mathematics

please show me step by step thanks

2007-07-22 12:17:27 · 3 answers · asked by Anonymous in Mathematics

Is there anywhere I can adopt a star for free online?

2007-07-22 12:16:41 · 6 answers · asked by Missy 3 in Astronomy & Space

I have a machine with 3 wheels 120 degrees apart from eachother, basically making an equilateral triangle. when this machine runs you put a baseall on top of these 3 wheels, and the wheels spin in certain ways to make the ball rotate in 3 different directions. Right now I have 3 very strong motors connected to these wheels that spin the ball. I am now trying to make a prototype that will be economical and need to figure out how strong these motors need to be at minimum. How should I figure this out. Is there some calculations I can do or, is it just going to be trial and error?

2007-07-22 12:16:16 · 1 answers · asked by JoeSchmoe 2 in Physics

20x - 4y = -8
y = 2 + 5x

2007-07-22 12:14:49 · 7 answers · asked by shy31 2 in Mathematics

instead of the large cleared expanses that were prevalent in the southern plains states in the US in the 1930s (and still are today), would a series of small micro-farms interspersed among the wilderness have been better suited to cope with the dust bowl conditions back then? or would they have been just as vulnerable to the winds and drought as the large open tracts were?

would a technique using micro-farming and/or permaculture be successful if such a situation arose again today? the climate is changing, it's best to have alternatives at the ready 'just in case'.

2007-07-22 12:14:44 · 8 answers · asked by patzky99 6 in Agriculture