Science & Mathematics - 4 August 2007

50% OF GIRLS AGED 16-39 and 25% of boys in the same age group watched a netball game. If 48% are male what percentage of 16-39yr olds watched the netball?

2007-08-04 20:56:43 · 1 answers · asked by Anonymous in Mathematics

I'm studying wind turbine technology at the moment. I'm stuck on the concept of feathering. It is exploited in order to ensure that a turbine will only go so fast in a high wind. But how does it work?

2007-08-04 20:56:14 · 1 answers · asked by tuthutop 2 in Engineering

2007-08-04 20:47:28 · 2 answers · asked by Anonymous in Engineering

2007-08-04 20:46:51 · 3 answers · asked by NURUL A 1 in Physics

I'm not thinking of a normal habitat that might occur in nature, but rather a bio-engineered habitat. It seems to me that one actually could evolve a habitat with a mixture of microorganisms that are evolved to be responsive to certain very specific fish in certain very specific ways - ways which may enable a fish not normally accustomed to one type of water to handle it at least at a tolerable level.

There's not necessarily an ultimate "purpose" for such a scenario, I'm just curious if we currently have the knowledge that would be required to produce such a thing. It would make for some interesting "novelty aquatic displays", I'd think.

2007-08-04 20:46:08 · 6 answers · asked by uncleclover 5 in Biology

2007-08-04 20:42:14 · 9 answers · asked by rosinta s 1 in Chemistry

2007-08-04 20:41:17 · 5 answers · asked by naval k 1 in Chemistry

2007-08-04 20:40:29 · 1 answers · asked by gautam k 1 in Engineering

season,strength,total number/longtitude/etc., or is it just us?

2007-08-04 20:36:30 · 8 answers · asked by biff 1 in Weather

2007-08-04 20:31:40 · 10 answers · asked by rosinta s 1 in Chemistry

suppse you were given the three radioactive cookies, one is mixed with alpha particles, the second with beta, and the third with gamma. You are allowed to eat one, hold one, and place one in your pocket. Which cookie should be placed where so that you will receive least radiation? explain your answer.


can you help me guys?

BEST ANSWER for the one who could givne me the most convincing answer and the very informative one also.

2007-08-04 20:31:39 · 4 answers · asked by Anonymous in Physics

1) A current of 84.1 mA exists in a metal wire. How many electrons flow past a given cross section of the wire in 10.6 min?

2) A nichrome wire with a resistance of 18 resistance is conne cted across the terminals of a 24 V flashlight battery. How much current is in the wire? answer in units of A.

2007-08-04 20:31:27 · 2 answers · asked by jay b 1 in Physics

To be clear, I do not mean via any technological route or any sort of trickery. I mean for instance that I look at the wall beside me - is there anything my mind can do to turn the simple act of paying attention to the wall into actually causing changes within the atoms of the wall - even if only on the subatomic level? That's just an example scenario, feel free to refer to it or to any other mind/matter scenario you wish in your reply.

I'm posting this here instead of the religion & spirituality forums because if it can occur at all, the type of phenomenon I'm inquiring about would be empirically verifiable and thus within the realm of science. Unfalsifiable answers and speculations based on things which are not empirically observable - these things need not apply. ;-)

2007-08-04 20:28:00 · 7 answers · asked by uncleclover 5 in Physics

2007-08-04 20:25:23 · 14 answers · asked by anie89 1 in Mathematics

2007-08-04 20:22:39 · 6 answers · asked by lazybonz1974 1 in Mathematics

Aside from an ordinary clock...

2007-08-04 20:22:02 · 5 answers · asked by Anonymous in Physics

Please Explain thoroughly.

2007-08-04 20:19:41 · 6 answers · asked by AvEnGeR 3 in Geography

what is the principle behind it???

2007-08-04 20:17:57 · 3 answers · asked by Anonymous in Chemistry

a sea form of a cow is a manatee
a sea horse is a sea form of a real horse
an otter is a seacat
u know what a sea lion is!!!
so what is the sea form of us???

dolphins or what???

2007-08-04 20:17:54 · 13 answers · asked by westafrocherokee 1 in Biology

Keq= FeSCN2+/((Fe3+)(SCN-))

2007-08-04 20:14:11 · 2 answers · asked by :) 1 in Chemistry

16sin2x + 16cos2x = 10 find the value for x...........
that 2 is raied to the power i mean it is square.........

2007-08-04 20:08:13 · 4 answers · asked by dedchad 1 in Mathematics

It is said that opiate neuropeptides influence immune functions. Any examples? and what's the mechanism? Thanks.

2007-08-04 20:05:12 · 1 answers · asked by freezerfairy 1 in Medicine

First, I do believe, and if you think about it, its impossible that there aren't any. Just think about how many stars there are just in our galaxy. Now think about how many of those stars have planets. and now think about how many galaxies there are. Does anyone else feel that its impossible that we could be the only living things in this Universe?

2007-08-04 20:03:55 · 24 answers · asked by Anonymous in Astronomy & Space

any article about it? i need some answers :)

2007-08-04 20:02:57 · 4 answers · asked by Creative 2 in Chemistry

You designed a stunt in which a man, who weighs 60 kg, is shot out of a cannon that is elevated 40° from the horizontal. The “cannon” is actually a 0.91-m diameter tube that uses a stiff spring and a puff of smoke rather than an explosive to launch the man. The manual for the cannon states that the spring constant is 1,822 N/m. The spring is compressed by a motor until its free end is level with the bottom of the cannon tube, which is 1.5 m above the ground. A small seat is attached to the free end of the spring for the man to sit on. When the spring is released, it extends 2.7 m up the tube. Neither the seat nor the chair touches the sides of the 3.7-m long tube, such that friction can be neglected. After a drum roll, the spring is released and the man will fly through the air. You have a 0.91-m thick airbag waiting for the man to land on. You need to determine if the airbag is thick enough to stop the man safely – that is, so he is slowed to a stop by the time he reaches ground level

2007-08-04 20:00:45 · 4 answers · asked by Sammy Baby 1 in Physics

is it true that aliens (universe people) are 10,000 years ahead of us.And they know we exist on our planet but refuse to make contact cause they know we are violent and keep a eye on us to make sure we don't ruin the galaxy?

2007-08-04 19:57:18 · 38 answers · asked by The Game 3 in Astronomy & Space

Kindly send me detailed eplanation about it or some link would also do

2007-08-04 19:56:22 · 4 answers · asked by Anonymous in Physics

Is there a drug that people carry in a capsule and it smells really bad.

2007-08-04 19:56:11 · 3 answers · asked by Anonymous in Medicine

Am I the only person that finds it odd that someone would make an ARCH bridge where the arch is made out of steel?

The arch in an arch bridge is always under compression, and steel is not that great under compression. I think a small layer of steel reinforced concrete under the steel arches would have made that bridge last forever. There are stone arches that were built over 1000 years ago still standing, but thats because stone and concrete are great under compression. Steel arches are pretty much worthless and give you a false sense of security.

Anyone else feel this way?

2007-08-04 19:55:39 · 5 answers · asked by Anonymous in Engineering

In an spectrophotometric determination of equilibrium constant for a reaction,
why is diluted 0.20M Fe(NO3)3 in 0.1M HNO3 is used as the blank reagent instead of distilled water which has zero absorbance?

2007-08-04 19:44:53 · 2 answers · asked by :) 1 in Chemistry