Science & Mathematics - 29 September 2007

1. dimethyl ketone
2 isopropyl alcohol
3. aluminum potassium sulfate
4. acetylsaloicylic acid
5. sodium bicarbonate
6. sodium hydroxide
7. sodium nitrate
8. carbon crystal
9. ascorbic acid
10. sucrose

2007-09-29 23:59:57 · 3 answers · asked by chocolate :) 4 in Chemistry

x^2 - 2 = 0

Please answer.

2007-09-29 23:57:34 · 6 answers · asked by luv 1 in Mathematics

How can a prism be used to disperse white light?

2007-09-29 23:48:21 · 5 answers · asked by Anonymous in Physics

1. First question, What relationship exist between Voltage and Current? Is it a hyperbola, a straight slope, etc.. or what? Also what is the significance of the slope of this graph.

2.Second, After plotting the current and the reciprocal of the resistance, what is the slope and what does it represent? what relationship exist between Current and 1/Resistance

3. Last, In theory what current passes through a circuit having an 11-Ohm resistance connected across a 110-V line? 220-V Line?

P.S.
In the first question the Resistance or Ohms in the unit kOhms is constant with an incresing Voltage expressed in V. So is the Current in the unit of mA is it increasing or not?

In the 2nd question the Voltage is constant again is expressed in V with an decreasing resistance. So again is the Current in the unit of mA is it increasing or not?

2007-09-29 23:38:38 · 1 answers · asked by gcz79 2 in Physics

what is its features. . . answer it ASAP !

2007-09-29 23:11:38 · 3 answers · asked by hector 1 in Weather

Question improper integral

1) Integrate(O to Pi) 1/( Squareroot x + Sinx)
use the direct comparison test

2)integrate(o to 3) 1 / (xsquare-11x+24)

Question integration

3) integrate sin(2x). lncosxdx
use integration by part

2007-09-29 22:57:12 · 2 answers · asked by bloodybastard88 1 in Mathematics

Galileo Galileo was a Christian, George LeMaitre, the man who proposed the big bang theory was a devote Belgian priest, Professor Hawking keeps referring to God in his book “A brief history of time”. If people who have taken deep scientific thought about the universe believe in God why are their learners on this forum want to use their views to doubt the existence of the Creator?

2007-09-29 22:48:27 · 5 answers · asked by St Lusakan 3 in Astronomy & Space

A sample of cadmium weighing 3.512 g is dissolved in 3.00 M HCl.

Cd(s) + 2HCl(aq) -> H2(g) + CdCl2(aq)

This is the equation. I know that we need to use ratios...but i'm still not sure where to start. It would be really nice if someone can explaine to me how to do this equation and not just GIVE me the answer. Thank you everyone for your time.

Ciao.

2007-09-29 22:42:25 · 3 answers · asked by Anonymous in Chemistry

What I really want to know is weather or not a lack of the thyroide hormone triiodothyronine, congenital or not, slow the growth process and/or create delayed development? Because I know that triiodothyronine is responsible for a range of function's in the body ranging from growth to body temperature.

2007-09-29 22:38:14 · 3 answers · asked by flyboy711672005 1 in Medicine

What prevents an electron from flying off from an atom and what prevents an electron from trying to reach singularity with an atom?

2007-09-29 22:22:34 · 5 answers · asked by Anonymous in Physics

for hurricanes? What is significant about those wind speeds such that 39 mph is the lower threshold for tropical storms and 74 mph for hurricanes? What's the difference between, say, a 73 mph tropical storm and a 75 mph hurricane in terms of their effects? It just seems from a layman's perspective that those wind speeds are arbitrary, but I figure there must be some reason meteorologically that 39 and 74 mph are considered the lower limits for tropical storms and hurricanes. Any meteorologists out there who can shed some light on why these wind speeds are the cutoffs for tropical storms or hurricanes?

2007-09-29 22:17:52 · 2 answers · asked by Pastor Chad from JesusFreak.com 6 in Weather

2007-09-29 22:07:27 · 4 answers · asked by jerome m 1 in Geography

How are lungs adapted to make diffusion efficient?

2007-09-29 21:55:24 · 3 answers · asked by Roller 2 in Biology

2007-09-29 21:53:14 · 13 answers · asked by Francis7 4 in Astronomy & Space

lim (6^x - 7^x)/ (4x)
x->0

2007-09-29 21:20:45 · 2 answers · asked by sdt3 1 in Mathematics

2007-09-29 21:17:41 · 3 answers · asked by maxxene109 1 in Earth Sciences & Geology

There was a game some of my friends and i would play, there was a old copper mine up around were we lived, the mine was closed down because there were Native American bones in the back of the cave, at least that's what it said in the old news papers at the museum, but the real reason the mine was closed was because 27 miners died in that mine one day after the burial chamber was found, the mine owners didn't want to lose there investments so they ordered the men back into the mine, they were told to destroy all evidence of any Native American burial chamber, after the miners went down into the mine the foreman heard screams coming from inside the mine shaft, another group was sent down to see what happened to the first group of miners, when they came back from down in the mines they were throwing up and saying that the bodies were torn into pieces by some kind of beast, the mine closed shortly after that and that was over a hundred years ago, the mine entrance was boarded up and sealed off, but we found a way into the mine through another cave we used to call it crystal cave because it never went that deep into the hillside and the inside of the cave walls had quartz crystals growing on them, the was a tremor that was centred in Vancouver but the after shocks was just enough to put a medium sized crack in the back wall of the cave that led into a much bigger cavern, we knew we were near the old copper mine so we were extra careful not to slip and fall, but it was to dark to go any deeper into the cave so we went home and grabbed some camping stuff, tents, sleeping bags, battery powered flash lights and stuff like that, the first night we camped outside of the cave till morning and when the sun came up we pack our day packs and headed back into the cave, we must have walked a 100 feet into the cave past the bigger cavern we found ealier, we found a old tunnel that was blocked off so we tore the boards down and kept going until we found a underground stream i guess thats why the tunnel was boarded up, so we back tracked but on the way back we found a side tunnel that we missed when we were going down the tunnel the first time, we walked for much longer this time it felt like we were walking forever until my friend tripped on something, it was some old rail track so we stood up and looked around with our flash lights to get our bearings, we must have found another way into the old mine but we never believed the old ghost stories people used to tell us, heck we were in our mid teens nothing could hurt us or so we thought, so we went deeper into the old mine until we came to a dead body old one of the miners that died down were, now we were getting a little scared, so we went a little deeper into the mine until we found three bodied, one of the bodies had it's hand up over it's face like something was attacking it, so we figured that we should head back(not because we were scared, or at least that's what we told ourselves) as we turned to start going back we heard some noises and seen a freaky glowing light coming towards us, so we said to hell with this and we started to run and as we were running the noise and light was getting closer, we made it back to were we had torn the boards down the when we made it to the end of the first small cave crystal cave, after we got to the first cave the lights and sounds had stopped but we chose to sleep outside that night, whatever it was in that cave i'll never know because i never went back into that cave ever again, but when we would meet new friends we would dare then to sleep inside the first cave with a warning never to go deeper into the second tunnels.

2007-09-29 21:15:41 · 18 answers · asked by Anonymous in Paranormal Phenomena

Any help with this question this would be much appreciated - I appear to be making it more difficult than it should be! Thanks!

Integrate:

x^2/x+1

2007-09-29 21:12:28 · 2 answers · asked by Anonymous in Mathematics

Or do students in medical school have to do things like this anyway before they even choose their specialty? Pretty much, i want to know if there is any way to become a doctor and avoid having to do things like draw blood, give shots, do surgeries, things like that, that make some people queasy. And if so, what medical specialties can avoid this. Thanks!

2007-09-29 21:00:50 · 7 answers · asked by rwfocus007 2 in Medicine

2007-09-29 20:49:20 · 4 answers · asked by Anonymous in Chemistry

2007-09-29 20:49:09 · 10 answers · asked by Anonymous in Biology

Let's say I've got a weird rotated scalene triangle. How do I calculate the area of this? Which leg is the base leg?

2007-09-29 20:47:40 · 7 answers · asked by Anonymous in Mathematics

2007-09-29 20:47:08 · 4 answers · asked by Anonymous in Chemistry

2007-09-29 20:43:15 · 7 answers · asked by Anonymous in Chemistry

2007-09-29 20:37:00 · 1 answers · asked by jally c 1 in Chemistry

2007-09-29 20:27:47 · 1 answers · asked by Gideon 1 in Chemistry

Please don't tell me who invented it - tell me how he invented it PLEASE!

2007-09-29 20:20:36 · 2 answers · asked by Etak Eidlog 3 in Chemistry

2007-09-29 20:13:41 · 2 answers · asked by Anonymous in Biology

A satellite is in a circular parking orbit of radius rp=7337km from the centre of the earth. Determine the velocity increases v2-v1 and v4-v3 necessary to perform a hohmann transfer to a circular orbit with radius equal to the radius of the moon's orbit, 383,000km

Full working and the formula u used would be appreciated

2007-09-29 20:10:03 · 1 answers · asked by Anonymous in Physics

2007-09-29 20:06:58 · 10 answers · asked by Kat Videl 1 in Weather