Science & Mathematics - 21 December 2006

I know it's some kind of water vapour, but why is it sometimes thicker than others etc - today you can hardly see your hand in front of your face here in Berkshire...

2006-12-21 01:40:55 · 9 answers · asked by Anonymous in Weather

2006-12-21 01:40:50 · 6 answers · asked by Total Insanity! 2 in Other - Science

I know it has something to do with communication[I think] but need scientific explanation of exactly what it is and what it is used for..
Please give details of this....Thank you!

2006-12-21 01:40:38 · 2 answers · asked by ladybug 4 in Engineering

2006-12-21 01:38:19 · 4 answers · asked by Ali 1 in Mathematics

Shouldn't it be biratic?

2006-12-21 01:33:55 · 7 answers · asked by JuJu 3 in Mathematics

Someone just told me that we are having shorter days because our earth has slightly moved out of place. Has anyone else heard of this? Sounds wierd to me!!!

2006-12-21 01:32:24 · 12 answers · asked by Anonymous in Astronomy & Space

I'm having difficulties with the following question:

The curve C has equation y = x^2 - 4ax + 3a^2, where a is a positive constant.

• Factorise the expression for y, and hence sketch the curve, showing clearly its points of intersection with the coordinate axes

• Write down the solution of the inequality y = x^2 - 4ax + 3a^2 < 0

I know that the factorised version is (x-a)(x-3a) but I was told that without an explanation of how to get it.

I'd be very grateful if somebody please help me on how to answer.
Thanks in advance,
MAK

2006-12-21 01:31:51 · 6 answers · asked by Anonymus 2 in Mathematics

2006-12-21 01:29:20 · 5 answers · asked by ken.chpmn 1 in Engineering

specification for 11kv cable glanding

2006-12-21 01:26:08 · 1 answers · asked by Anonymous in Engineering

2006-12-21 01:24:52 · 5 answers · asked by ken.chpmn 1 in Engineering

Liquid petroleum gas means, is it in the gasious form or in liquid form at the atmospheric temperature and pressure? All gases are alkanes(mojor part of this is butane) and these are in gasious state only, bacause they are not higher alkanes.

2006-12-21 01:24:20 · 5 answers · asked by sara_swathi m 1 in Chemistry

2006-12-21 01:24:14 · 4 answers · asked by amjad ali a 1 in Medicine

I'm a bit stuck at this - can anyone help please!
The question is;

At 320C, the rate constant for the 1st order reaction

SO2Cl2 ---> SO2 + Cl2

is k=2.2 x 10^-5 s-1.

What percentage of SO2Cl2 will decompose in 90 minutes?

I know that to work out the half life it is;

t1/2 = 0.693/k

but how do I then calculate the percentage in 90 mins?

Thanks to anyone who can help!

2006-12-21 01:24:03 · 1 answers · asked by Showaddywaddy 5 in Chemistry

wat does this 1 stand for???

2006-12-21 01:15:00 · 9 answers · asked by sri_july27 2 in Mathematics

2006-12-21 01:08:38 · 15 answers · asked by hellllooooo 2 in Weather

2006-12-21 01:07:51 · 10 answers · asked by Anonymous in Astronomy & Space

wat is differentiating with respect to a variable like 'x'?

2006-12-21 01:07:32 · 8 answers · asked by sri_july27 2 in Mathematics

What is the advantages of CSBT technology over Trench technology or the any existing technology? My question is related to switching performance in AC Drives

2006-12-21 01:06:49 · 1 answers · asked by ravishankar k 1 in Engineering

The module can only provide the latitude and longitude dat

2006-12-21 01:02:44 · 3 answers · asked by Anand K 1 in Engineering

i ve heard that there is a way to re-use that in rhodium plating.

2006-12-21 00:58:30 · 0 answers · asked by sid 1 in Chemistry

Actually I know that functioning of fredge creates chloro floro carbons and which pollutes the whether.But I want actully process goingon in the fredge functioning.

2006-12-21 00:58:26 · 5 answers · asked by sara_swathi m 1 in Physics

what 'system' of measurement do we use? What is it called?

2006-12-21 00:57:50 · 11 answers · asked by Anonymous in Mathematics

Chemistry

2006-12-21 00:56:58 · 8 answers · asked by confused 1 in Chemistry

If one ml of water weighs one gram and one fluid ounce of water weighs one ounce, why are there 28 grams to the once and 29.5 ml to the fluid ounce?

2006-12-21 00:55:24 · 5 answers · asked by angel_light 3 in Chemistry

then A:C is equal to?

2006-12-21 00:53:33 · 19 answers · asked by raj_paragon 1 in Mathematics

2006-12-21 00:51:02 · 5 answers · asked by Sammi 1 in Biology

These are endoskeletons such as are found in the Class Osteichyles of Kingdom Animalia, examples like sharks, rays and skates.

The advantages are that the endoskeleton is light, protects the fragile organs such as the brain, and a few others. But I can't find anything about the disadvantages. Plz help?

Thanks!

2006-12-21 00:48:20 · 8 answers · asked by ♫ ∫aoli 4 in Biology

calculate the volume of a sphere daimeter 17cm.
b)evaluate the surface area of radius 8.5cm
c)calculate the volume and surface are of the surface earth assuming that it is a sphere of radius 6,370km,
correct to 3 significant figure ( use pi=3.142 ).

2006-12-21 00:47:32 · 2 answers · asked by star 2 in Mathematics

2006-12-21 00:47:00 · 13 answers · asked by phil blaster 1 in Weather

2006-12-21 00:40:48 · 2 answers · asked by speedball182 3 in Engineering