Science & Mathematics - 22 November 2006

if hydrogen is a gas why does it belong to alkali not in noble gases?

2006-11-22 23:58:21 · 13 answers · asked by Phoebe Rose S 1 in Chemistry

how is sine wave generated

2006-11-22 23:50:43 · 3 answers · asked by Anonymous in Physics

2006-11-22 23:40:10 · 3 answers · asked by Jochebed C 1 in Chemistry

thnxs

2006-11-22 23:37:47 · 7 answers · asked by Mikaela 1 in Mathematics

if three small squares are place side by side in a row, the result is a rectangle whose area in sq m is six times its perimeter in m. find a side of one of the squares

2006-11-22 23:37:46 · 6 answers · asked by khamyll 1 in Mathematics

one leg of a right triangle is 1cm longer than the other leg, and hypothenuse is 2cm longer than the shorter leg. find the lengths of the three sides of the triangle.

2006-11-22 23:30:29 · 3 answers · asked by khamyll 1 in Mathematics

one positive integer is three lager than another positive integer. the sum of the squares of these integer is less than three times the product of the integers. find these integers.

2006-11-22 23:28:15 · 3 answers · asked by khamyll 1 in Mathematics

Can anybody give me examples of natural phenomena which combine power and flow. eg. rivers I need examples other than water

2006-11-22 23:25:25 · 6 answers · asked by nomadnur 1 in Earth Sciences & Geology

2006-11-22 23:13:17 · 13 answers · asked by CantCageMe 1 in Engineering

can someone please explain what Normal Distribution in the most basic way they can.

thank you :-)

2006-11-22 23:11:35 · 3 answers · asked by Anonymous in Mathematics

2006-11-22 23:08:53 · 2 answers · asked by david b 2 in Astronomy & Space

2006-11-22 23:07:56 · 6 answers · asked by Anonymous in Physics

2006-11-22 23:07:13 · 4 answers · asked by Bianx 2 in Chemistry

...restart the heart with an injection of adrenaline after it stops? Like in the movie, "Flatliners" and in an episode of "24". If not adrenaline, then something else maybe?

2006-11-22 23:04:23 · 8 answers · asked by 1/6,833,020,409 5 in Medicine

How can so many people who tell us they are so intelligent believe such rubbish of a universe starting at a point and extend in dimensions?

2006-11-22 22:59:02 · 14 answers · asked by St Lusakan 3 in Astronomy & Space

i know how they died i just need to research different sources...

2006-11-22 22:56:30 · 6 answers · asked by i am not a retard :) 1 in Biology

2006-11-22 22:55:52 · 5 answers · asked by Marissa Villena 1 in Earth Sciences & Geology

2006-11-22 22:53:25 · 6 answers · asked by joseph a 1 in Earth Sciences & Geology

If the molecular formula of ethanol is C2H6O and its structural formula is CH3CH2OH ...
and if the molecular formula of isoprpanol is C3H8O and its structural formula is CH3CHOHCH3 ...
what is the structural formula of tert-butanol whose molecular formula is C4H10O?

2006-11-22 22:52:42 · 7 answers · asked by Justin G 2 in Chemistry

I heard that earth quack will cause dam failure? but Is dam failure cause an earth quack?

2006-11-22 22:50:43 · 11 answers · asked by sumesh p 1 in Earth Sciences & Geology

There are only 5 perfectly symmetrical polyhedrons, the tetrahedrons(4faces), the cube(6faces), the octrahedron(8faces), the dodecahedrons(12faces) & icosahedrons(20faces), Calculate the expected value for dies made in each of these shapes?

2006-11-22 22:49:26 · 2 answers · asked by SHAILY 1 in Mathematics

other planets have more than one moon.

2006-11-22 22:48:41 · 14 answers · asked by Dragonfly 3 in Astronomy & Space

I need to find out for my school project and so far i can't find anything and it's due in two weeks so please help me.

2006-11-22 22:44:00 · 5 answers · asked by Anonymous in Earth Sciences & Geology

Suppose you buy 4 boxes of cereal and each box has an equal probability on containing any one of the 7 collector cards. What is the probability of getting 4 identical cards?

2006-11-22 22:43:52 · 1 answers · asked by SHAILY 1 in Mathematics

I need to digest a vector (single digestion, sticky ends) and dephosphorylate before ligation with the insert and then transformation into E.coli. The problem is I don't have much of the vector to begin with (v. low yield) and I keep losing alot of DNA in purification. Do I absolutely need to purify between digestion and dephosphorylation? And do I really need to purify again before ligation? I've heard it's not neccessary, but what about the mix of buffers you get? I'll heat inactivate the RE, but do I need to do this with the AP? Any suggestions would be appreciated.

2006-11-22 22:38:36 · 2 answers · asked by cheetara_2001 2 in Biology

2006-11-22 22:18:21 · 6 answers · asked by NAFIS B 1 in Astronomy & Space

2006-11-22 22:16:20 · 39 answers · asked by Roger S 2 in Geography

2006-11-22 22:14:34 · 13 answers · asked by kamspillai 1 in Physics

Q:20) y is directly proportional √x and y = 4 when x = 16 find the equation connecting x and y

a) If P is inversely proportional to q, and p = 8 when q = 5,
find y when x is 10.

b) Given that y varies inversely as x^2.
i)What is the effect on y if x is multiplied by 2
ii)What is the effect on x if y is divided by 9?

! __________- _________ - _________ - ________- ________ !

2006-11-22 22:09:10 · 5 answers · asked by Anonymous in Mathematics

I can only use the identities, sin^2x + cos^2x =1 and tanx = sinx/cosx, and of course factorisation. I am getting approx. values of 38 and 142 degrees.

2006-11-22 22:07:31 · 6 answers · asked by stevie g 1 in Mathematics