Science & Mathematics - 13 December 2007

Sure, everyone before us has died and thousands die every day- but does this mean there's actual proof that you or me are going to die?

Is there definitive proof that an individual will one day die or just overwhelming odds?

2007-12-13 23:50:50 · 48 answers · asked by DaveyMcB 3 in Other - Science

2007-12-13 23:49:45 · 23 answers · asked by Anonymous in Astronomy & Space

1
A swimming pool that is 3.05 m wide by 6.10 m long has an average depth of 2.75 m. The density of water is 1.00 g/cm^3. What is the mass of water in the pool when it is filled?
2
One barrel of crude oil weigh 0.136 metric tonnes . A metric tonne is exactly 1000kg. A barrel has a volume equal to 158.98 L. What is the density of crude oil in g/ ml?
3
The density of coconut oil is 57.7 puonds/ft^3. What is the value in g/cm^3? The fallowing relation are exact; 1 ft =12 in = 2.54 cm, 1 pound = 453.6 g.

2007-12-13 23:46:44 · 2 answers · asked by Math help me 1 in Chemistry

is there any species on earth that has tightly curled hair or is this trait special to people of african descent?

2007-12-13 23:46:04 · 5 answers · asked by Noni 1 in Zoology

observer or is time really slowing to the occupant,and if thats true could you live a lot longer traveling at that speed?

2007-12-13 23:40:46 · 4 answers · asked by john doe 5 in Astronomy & Space

I've heard it's rare for an earthquake to open underneath you but how deep would you fall if it does happen?

2007-12-13 23:38:38 · 5 answers · asked by Jadey 2 in Earth Sciences & Geology

If you don't know them all you can just explain or solve the ones you know. I really really need help.

1
The density of diamond is 3.51 g/cm^3 and a graphite is 2.22g/cm^3. Both substance are pure carbon. What volume, would 10.0 g of carbon occupy
a) In the form of diamond?
b) In the form of Graphite?

2
The mass of the sun is 1.991 x 10^30 kg and the density of the sun is 1.41in the 0 g/cm^3. What is the volume of the sun in m^3?

3
The mass of the Earth is 5.979 x 10^24 kg and the density of the earth is 5.519 g/cm^3. What is the volume of the Earth in m^3?

4
Under certain condition, the density of dry air is 1.205 g/L. What is the mass of the air in a room that is 3.658 m wide by 4.572 m long by 2.438 m high?

2007-12-13 23:38:00 · 4 answers · asked by Math help me 1 in Chemistry

Let A be a subset of R^n with Lebesgue measure m(A) < oo. Let x + A be the translation of A by the vector x of R^n and define f:R--> [0, oo) by f(x) = m( A intersect (x + A)). Show that f is continuous.

My idea was to prove this first to nice sets like cells and then approximate A by a sequence of such nice sets. I tried to obtain a sequence of continuous functions converging uniformly to f, which would establish its continuity. But I got mixed up.

Is this aproach good? Can anyone help, maybe suggesting a different approach.

Thank you

2007-12-13 23:36:42 · 2 answers · asked by Steiner 7 in Mathematics

2007-12-13 23:31:10 · 10 answers · asked by Jacob F 2 in Mathematics

is there a website or an organization that forecasts, reliable forecasts, about two weeks ahead?.... a little more technical than the Old Farmer's Almanac?..... got a wedding in two weeks... need to know if possible..... long drive to get there!!!... thanks all.....

2007-12-13 23:24:14 · 7 answers · asked by meanolmaw 7 in Weather

2007-12-13 23:20:09 · 15 answers · asked by Maria Cecilia O 1 in Weather

2007-12-13 23:19:35 · 15 answers · asked by Rock star 2 in Physics

Can anyone help me how to solve this problem step by step. Please click on the link to see the problem. Thanks...

http://img528.imageshack.us/img528/697/18717776gk2.png

2007-12-13 23:17:19 · 4 answers · asked by David N 1 in Mathematics

and turn it into a second sun?

2007-12-13 23:16:03 · 10 answers · asked by john doe 5 in Astronomy & Space

2007-12-13 23:13:26 · 4 answers · asked by Anonymous in Zoology

I got this doubt when i was going through diffrences between pressure and stress.

2007-12-13 22:55:57 · 6 answers · asked by prajwal 1 in Physics

A mine car, whose mass is 440 kg, rolls at a speed of .5 m/s on a horizontal track. A 150 kg chunk of coal has a speed of .8 m/s when it leaves the chute (sloping downward at 25 degreees above the horizontal). Determine the velocity of the car/coal system after the coal has come to rest in the car.

2007-12-13 22:53:55 · 2 answers · asked by laweezer08 1 in Physics

what is the product of this reaction ( aminoacetonitrile + cyanic acid)????? can you plz help me in this???

2007-12-13 22:48:53 · 5 answers · asked by Anonymous in Chemistry

if someone has an overdose, how would you test for this?

2007-12-13 22:48:46 · 3 answers · asked by Anonymous in Medicine

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2007-12-13 22:43:46 · 2 answers · asked by Anonymous in Physics

Find d/dx f(x) if we know that d/dx(f(3x))=x^2

2007-12-13 22:30:12 · 5 answers · asked by ---- 2 in Mathematics

Quick question. I am getting very confused with the types of different marijuana sold in Amsterdam . On the menus in states: Either Cannbis Sativa, Cannabis Indica or of course the hash products. I want the type of Marijuana we can buy in the states that makes you very "stoned" I keep smoking stuff over here in the pre-rolled joints that tastes like tobacco, do the joints have tobacco in them? If anyone could please help me I would really appreciate it. I thought I knew about smoking but I guess not. Thanks again, and take it easy,

Neal

2007-12-13 22:26:57 · 3 answers · asked by Anonymous in Botany

2007-12-13 22:23:28 · 14 answers · asked by jeenie 1 in Physics

I woul like to know how many bites= to 1kb. Hm kb =1mb. Hm mb=1gb?

2007-12-13 21:44:07 · 8 answers · asked by faiyaz m 1 in Zoology

Do you go by the leading coefficient or the multiplicity..

Ex...3x^4+7x^3+x^2-7x-4

How many zeros...I got three (1, -1 and -4/3)...so does that mean we go by leading coef...basaically, how can u tell?

THANKS!

2007-12-13 21:39:56 · 6 answers · asked by Anonymous in Mathematics

2007-12-13 21:38:45 · 3 answers · asked by charisz 2 in Chemistry

Ok so here is my thinking...

Scientists can study an atom and predict exactly how it will react/behave in the next second.

If there was a computer powerful enough to know exactly what every atom in the entire universe was doing then would it also be reasonable to assume that a sufficiently powerful enough computer would then be able to predict exactly what would happen next EVERYWHERE? Does this argue the point that there is no such thing as freewill and that our lives are mapped out for us?

2007-12-13 21:37:57 · 9 answers · asked by BlackbeltJudoJim 2 in Physics

Why doesn't light travel twice as fast as it normally does ?

2007-12-13 21:20:05 · 6 answers · asked by Anonymous in Physics

So my mates and I were mucking around in a tree and I slipped and fell three metres or so out onto the ground. I was unconsious and my mate called for an ambulance. Woke up five days later, was told I had been put in an induced coma, and had and operation to reduce brain swelling a pressure/drain fluids and another to put pins and rods into my ankle which was smashed. I had amnesia from the day of the accident and barely remember my stay in hospital. Last night I had a dream / consious thought and could feel the doctor putting the tube into my throat and the pin and rod in my foot. Could they of operated on me without anesetitic as I was in an induced coma or was it just me remembering nothing? Im still suffering head pain and need to get another MRI this week as doctors think my headahces are caused by more bleeding! Shi* IM scared

2007-12-13 21:13:02 · 2 answers · asked by Anonymous in Medicine

ok, the given series is, summation 1 to infinity of (n^4 * x^n)/2(n-1)! and we need to find the radius and interval of convergence

the ! is the factorial symbol not me exclaiming... hehe...
ok so
an + 1/ an = absval.( (n+1)^4 * (x^n+1) / 2(n)! * 2(n-1)!/n^4 x^n )

absval. ( (n-1) (n + 1)^4 x / n^4 )
(1-1/n)(1+1/n) / 1/n (x)

and then what? what am i supposed to do with 1/n in the denominator.

2007-12-13 21:12:08 · 1 answers · asked by Rogue Bagel 2 in Mathematics