Science & Mathematics - 16 December 2007

Clear liquid on top, with brown particulate matter on the bottom. Scientifically speaking, what is going on, and what is the solid matter that precipitates out?

I don't think I'm going to have any more Coca Cola!

2007-12-16 23:56:54 · 18 answers · asked by ♦♦pixiechix♦♦ 5 in Chemistry

please help me out i forgot this use sqroot 3, 2........

sin 60
cos 60
tan 60

sin 30
cos 30
tan 30

sin 90
cos 90
tan 90

2007-12-16 23:52:54 · 0 answers · asked by Jackline W 1 in Mathematics

Concentric conducting spherical shells carrying charges Q and -Q, respectively. The inner shell has neglligible thickness. Determine the electric field (a) less than a (b) between b and c (c) greater than c (d) what is the potential difference between the shell?

2007-12-16 23:51:07 · 1 answers · asked by andz 1 in Physics

2007-12-16 23:51:01 · 12 answers · asked by wangsacl 4 in Mathematics

The belt of a Van de Graaf generator carries a surface charge density of 5.0 mC/m². The belt is 0.50 m. wide and moves at 20.0 m/s.

a.What current does it carry?

b. If this charge is raised to a potential of 100.0 kV, what is the minimum power of the motor needed to drive the belt?

I don't understand how to do the question, pls help me, answers with explanations pls, tnx...

2007-12-16 23:50:51 · 2 answers · asked by Sammy Baby 1 in Physics

2007-12-16 23:50:15 · 6 answers · asked by thejakester01 2 in Zoology

Find the potential due to a thin, uniformly non-conducting charged rod of length 2a at the point (y,z). Take the rod along the z axis

2007-12-16 23:46:18 · 1 answers · asked by andz 1 in Physics

Why all metals are luster? I read some information before which said metals are luster because of their electrons sea. Is that right? If so, who can tell me the details about it.

2007-12-16 23:38:39 · 4 answers · asked by Anonymous in Chemistry

I'm looking for a different take on the Twin Paradox. I'm not travelling through space at high speed but back in time.
I hope the answer is that I thought I'd been there a few months but discover when I return I was there 1 year.

2007-12-16 23:33:42 · 6 answers · asked by Anonymous in Astronomy & Space

2007-12-16 23:30:41 · 33 answers · asked by Rock star 2 in Mathematics

a. amplitude: 35.7, period: π/4
b. amplitude: 0.34, period: 0.75π
c. amplitude: 16, period: 30π
I need steps too so I know how do do this, please.

2007-12-16 23:27:06 · 4 answers · asked by Anonymous in Mathematics

at an accident scene on a level road ,investigator measure a car's skid mark to be 88mlong .the accident occured in arainy day the coeffecient of static friction 0.42etermine the speed of the car when the driver slammed on the brakesans why does the cr's mass doesnt matter

2007-12-16 23:22:44 · 3 answers · asked by Anonymous in Physics

How much hay a day does an angus cow with calf require in adelaide hills region during summer months? The cows are breeding cows and approx 40-450kg. The calves are a couple of months old. There is a bit of supplementary feed in the paddocks.

2007-12-16 23:18:27 · 7 answers · asked by Kajja 1 in Agriculture

2007-12-16 23:18:02 · 5 answers · asked by einstein_1961 1 in Astronomy & Space

So far the only example I found is Copepods as a primary consumer in a marine food chain. Any other examples would be helpful

2007-12-16 23:14:56 · 4 answers · asked by TeganMc 2 in Zoology

do u have any sugestion for me to learn mathematics???

2007-12-16 23:10:46 · 2 answers · asked by MD 1 in Mathematics

2007-12-16 23:02:14 · 8 answers · asked by TeganMc 2 in Zoology

i live on the outskirts of a city (leeds) surrounded by green belt. i have no garden to entice birds or animals into, and no spcial camera equipment. armed only with binoculars, what are the best ways of seeking out wildlife?
early morning or late at night? what kinds of wildlife are yo likely to see around urban/semi urban riverbeds and streams, woods and parks, and how do you maximise your chances?

2007-12-16 22:58:23 · 4 answers · asked by Z 1 in Zoology

2007-12-16 22:54:19 · 1 answers · asked by St Lusakan 3 in Chemistry

We are erecting 128 buildings out of precast elements consisting mainly of load-bearing walls (no columns) and hollow-core slabs. Specifications say all embedded items in precast elements should be stainless steel. The precast manufacturer says that SS for lifting sockets is not required since the sockets will be used for lifting only and therefore need not be stainless steel as carbon steel sockets will serve the same purpose.

2007-12-16 22:48:58 · 5 answers · asked by ronald patrick 1 in Engineering

2007-12-16 22:48:44 · 6 answers · asked by kw man 1 in Mathematics

This show told a fictional & scientific analysis of what the year 2050 would be like. In one episode, a young boy learns of a virus from 2000 from his grandfather, and he accidentally hacks into a city computer, causing the city's lights to crash, etc. His grandpa is listed as a felon from the police department, and he and his grandpa work together to reboot the city. In another, the United States and China are working together on this space station to caputure more than 50% of solar power from these panels. The Chinese government threatens the Chinese worker saying that he must not let the United States get the information or they will hurt his wife. They travel to the space station by a space elevator. After figuring out how to maximize the solar energy panels, the two men transmit the message worldwide and the Chinese man thanks his government for taking care of his wife. Where on Earth can I find this? I have looked everywhere!!

2007-12-16 22:47:58 · 1 answers · asked by Kristin 1 in Astronomy & Space

2007-12-16 22:25:39 · 8 answers · asked by Samuel L 1 in Astronomy & Space

2007-12-16 22:23:27 · 9 answers · asked by l4zy_gti 2 in Zoology

2007-12-16 22:19:56 · 5 answers · asked by Anonymous in Geography

my doubt is that if the plastic used for recycling may be any medical things such as blood bags,cyringe(used for injuction,etc) the viruses from that material goes alive in the new material made frm recycled plastic?

2007-12-16 22:17:06 · 4 answers · asked by Arun 2 in Earth Sciences & Geology

2007-12-16 22:11:54 · 1 answers · asked by Jennymae M 1 in Earth Sciences & Geology

2007-12-16 22:09:50 · 4 answers · asked by m_nasery_k 1 in Engineering

2007-12-16 22:09:02 · 7 answers · asked by Anonymous in Astronomy & Space

OK, I'm retarded. Math isn't my bag. I should have paid more attention in class. But here I am and I need to know what 3e-8 means. A big number? A small number? I give up. (I will be happy if it's a small number though.)

More details: it's the probability of obtaining a SOBEL test result of 5.56668.

Thanks

2007-12-16 21:58:38 · 4 answers · asked by Anonymous in Mathematics