Science & Mathematics - 8 January 2007

2007-01-08 16:47:28 · 9 answers · asked by Anonymous in Chemistry

An analyst has pedicted that the growth rate, as a percent, for a specific mutual fund can be modelled by the equation:

r = 0.5x^3/2 - 6x^2/3 + 10.1, where x is the number of months and x is an element of [0,24]. Determine the best and worst times to invest in this mutual fund.

2007-01-08 16:44:45 · 3 answers · asked by Anonymous in Mathematics

i want to know abt fire fighting system and how we design it.wht is criteria and rules for pipe sizing(mean limitations for velocity and friction loss) and how to locate sprinklers?
if u have some use links so plz inform me.

2007-01-08 16:44:14 · 4 answers · asked by sunny 1 in Engineering

I have a natural repoire with animals, certain kinds in particular.. I feel I was born this way and those who know me have noticed and think the same.... It is especially strong with cats, dogs and wild birds... It's wierd, like I can make them trust me instantly... I think it is the strongest with wild birds, they are utterly fascinating to me and I have been able to walk right up to a wild chickadee and coax it to perch on my hand, no food, out in the middle of the bush I just walked up and put out my hand, the bird got on and let me stroke its feathers and hold him up to my face to look in his eye before he fluttered off. This kind of thing happens alot to me, and I never feed the birds, but they let me walk right up to them and sometimes touch them and they never act scared, its like they ignore me because they know im not a threat.... Does anyone else have a gift with animals like that?? Do you think people are born that way or is it just personality??

2007-01-08 16:42:48 · 6 answers · asked by Kelly + Eternal Universal Energy 7 in Zoology

Could I have someone perform the check portion of this problem. The problem: √{3(x+4)}=1+√{2x+7)}
Answer: x=2 or -2

I have tried and tried to perform the check portion, but to no matter how I go about it I can't seem to obtain a true equation. I know I am missing some very basic step, but I can't figure out what it is. (Note the answer is correct I just need the step by step check portion.)

Thanks to all, I really appreciate it.

2007-01-08 16:42:39 · 8 answers · asked by dallin.harmon 1 in Mathematics

The yield of a crop, in tonnes, is dependant upon the time, t, in days, between planting and harvesting, according to the follwoing formula.
Y(t) = {80t - t^2 - 1500 if t is an element of [30,50]
0 if t is an element of [0, 30)
or t is an element of (5, infinity)

On which day is the maximum yield reached, and what is the maximum yield?

2007-01-08 16:42:01 · 4 answers · asked by Anonymous in Mathematics

2007-01-08 16:41:56 · 4 answers · asked by Anonymous in Zoology

Project

article says...when passed over a precious- metal catalyst such as .ruthenuim the compound reacts with water to liberate hydrogen that can be fed to a fuel cell..so in this case how is the catalyst reacting i am so confused...any hint?i mean usually a catalyst speeds up a reaction...wat about this case?

2007-01-08 16:41:49 · 3 answers · asked by Simply Simple 1 in Chemistry

If you have two 8 stud lego blocks they can be assembled 24 ways.
If you have three they can be assembled 1,560 ways
If you have four they can be assembled 119,580 ways
If you have five they can be assembled 10,116,403 ways

I just can't figure it out.

2007-01-08 16:41:45 · 3 answers · asked by Anonymous in Mathematics

2007-01-08 16:37:13 · 1 answers · asked by john e 2 in Geography

Its just a standard thermometer. It broke inside a circular container, so I am not sure if liquid leaked out of the container. Is it possible for mercury to spill out of the thermometer through the pore, and onto my backpack. How should I throw it away? What dangers are associated with broken thermometers?

2007-01-08 16:37:05 · 11 answers · asked by disoneguy300 3 in Other - Science

2007-01-08 16:35:22 · 10 answers · asked by Anonymous in Physics

Just curious to see how you would see yourself as another being and what you would want earth for. I would be Contempress Celita from the planet Crizotic and I would be here to steal the cadbury secret, just kidding but humor me ok.

2007-01-08 16:34:57 · 6 answers · asked by CelticFairy 3 in Astronomy & Space

how the fish are alive in a frozen lake ?

2007-01-08 16:34:45 · 8 answers · asked by brajesh 1 in Physics

2007-01-08 16:34:30 · 2 answers · asked by man t 1 in Engineering

Find the radius of the semicircle that will maximize the area of the window. Please show work. Thanks. (:

2007-01-08 16:34:01 · 4 answers · asked by Anonymous in Mathematics

2. tan x = (sq. root 3)/4 in quadrant 3
sin and cos?

3. sin x = -5/3 in quadrant 4
cos and tan?

2007-01-08 16:33:29 · 5 answers · asked by Tiffany 3 in Mathematics

2007-01-08 16:33:22 · 9 answers · asked by David 3 in Biology

2007-01-08 16:32:26 · 8 answers · asked by seeking 1 in Mathematics

roygbiv is an acronym for the colors of a rainbow ....but why is it written with spaces ??.... is it a person's name ???

2007-01-08 16:30:32 · 4 answers · asked by ♥~~Hey~~♥ 3 in Earth Sciences & Geology

I need to know, like RIGHT NOW!!!
I think its PH

2007-01-08 16:30:24 · 2 answers · asked by Veronica ♥ 5 in Chemistry

in each of the following problems find the p which way the parabola opens the focus the directrix the latus rectum domain and range

4y^2=x
y^2=-16x
-36y=x^2
x^2+12y=0
-80y+2x^2=0
3y^2-12x=0
3x^2-4y=0
-24y+x^2=0
-4x+9y^2=0
x=1/2y^2
y^2=3x
x-7y^2=0
y=-2x^2
8x^2+12y=0

2007-01-08 16:29:46 · 5 answers · asked by Anonymous in Mathematics

I'm just wondering, what would happen if,
i were to get four magnet bars, turn them over so they are they repell each other. Then put a small metal ball inbetween the four mangets. Would it float?
This was a idea i had for a science project.
Would this actually work. If not do you any other suggestions.

2007-01-08 16:27:22 · 2 answers · asked by Anonymous in Other - Science

2007-01-08 16:26:00 · 4 answers · asked by Khristina C 1 in Physics

If dinosaurs were adam and eve then the bible thing makes perfect sense but if adam and eve were in fact humanoids then who could believe that?

2007-01-08 16:23:30 · 12 answers · asked by Anonymous in Earth Sciences & Geology

3/4x^(1/2) - 4x^(-1/3) = 0

2007-01-08 16:18:39 · 3 answers · asked by Anonymous in Mathematics

2007-01-08 16:18:31 · 8 answers · asked by phijan88 2 in Zoology

2007-01-08 16:17:39 · 8 answers · asked by phijan88 2 in Physics

physics

2007-01-08 16:16:45 · 7 answers · asked by vinit j 1 in Physics

I'm trying to find this answer on the regular "oh-so-hated" Google engine, but, unfortunately, I have no luck. Anyone help? It's a science project for my brother, we only have about two days until it's due and he hasn't even started. My sibling conscious is making me do this. Anyone help me, please?

2007-01-08 16:14:32 · 8 answers · asked by Mica 1 in Chemistry