Science & Mathematics - 4 December 2007

2007-12-04 05:13:04 · 6 answers · asked by jim m 5 in Astronomy & Space

2007-12-04 05:12:51 · 8 answers · asked by dsbd05181988 1 in Mathematics

what is an irrational number?
or what does the term irrational number mean

2007-12-04 05:10:18 · 7 answers · asked by Anonymous in Mathematics

If land covered 72% of earth?? what type of circumstances we would have here? like would the pollution levels be the same as now? Population? what about the water resources and natural resources?? whats ur view on that.

2007-12-04 05:10:07 · 2 answers · asked by MaGiC_ClaW 2 in Geography

I can't remember how to do the ln of a number, can someone please show ln(90/75), I know it has something to do with 'e' function.

2007-12-04 05:10:01 · 6 answers · asked by Anonymous in Mathematics

the speed with which a body should be projected from the earth's surface in order to reach an infinite distance is about 1.1*10^4 m/s.Estimate the speed of escape from the moon.
[(mass of earth)/(mass of moon)=81
(radius of earth)/ (radius of moon)=3.7]

2007-12-04 05:05:03 · 3 answers · asked by lp342 4 in Physics

I did a lab and the sheet has 3 problems:
I need someone to look over two of them and explain the third one.

Write a balanced equation for the reaction that took place:
I got - CaCl2 + Na2CO3 ----> CaCO3 + 2NaCl

What kind of reaction took place:
Double Replacement?

And now it wants a Net Ionic Equation?
How would I write that?

2007-12-04 05:00:00 · 6 answers · asked by Anonymous in Chemistry

Thanks.

2007-12-04 04:59:28 · 6 answers · asked by hmm 5 in Earth Sciences & Geology

Was this a long time ago?

Are they still coming through our atmosphere today?
Could we intercept one?, if so. (Assuming a better study since the earth's atomsphere contaminates/morphs the rock rendering it hard to study, so to speak.

2007-12-04 04:58:01 · 4 answers · asked by Jansen J 4 in Astronomy & Space

if there is human in mars i want marry one lady from mars

2007-12-04 04:55:16 · 8 answers · asked by blessedboy 1 in Astronomy & Space

2007-12-04 04:49:52 · 12 answers · asked by ? 1 in Mathematics

I need help from all you mathematicians and geneticists out there to make sure I get my calculations correct for a newsletter article. Here goes, one parent has dominant RR, the other recessive rr for trait #1, so the F1 generation all have Rr. Cross those and 1 in 4 (25%) of the the F2 will be recessive rr. With a second trait involved, say dominant AA and recessive aa, I believe the odds of an F2 being recessive rr-aa is 1 in 16. I think. Here's the tough part, with 14 traits involved, what would the odds be of getting a F2 recessive for all traits? Thanks!

2007-12-04 04:44:07 · 2 answers · asked by bikinkawboy 7 in Biology

i am not astronomer but i am confused at this time i totaly changed my thinking to astronomy related issues. specailly i am thinking that if there is human in mars i will marry one lady from mars

2007-12-04 04:40:03 · 5 answers · asked by blessedboy 1 in Astronomy & Space

1. Explain how sodium hydroxide solution and hydrogen are produced by the electrolysis of sodium chloride.
2. when copper sulphate solution is electrolysed using carbon electrodes, the electrolyte becomes acidic after some time. why?
3/ Aluminimium is obtained by the electrolysis of motlen aluminium oxide. Name the anode and the cathode and the electrolyte using in the method. write the electrode reaction alos.
please help me, i dont understand the questions!!! thanks who ever helps!

2007-12-04 04:30:28 · 1 answers · asked by unknown 1 in Chemistry

in a MLA style paper?

2007-12-04 04:27:26 · 2 answers · asked by Broccoli 2 in Geography

sun gemini,moon gemini,mercury gemini,venus taurus,mars aries,jupiter capricorn,saturn capricorn,uranus leo,neptune scorpio,pluto virgo

2007-12-04 04:24:25 · 3 answers · asked by Anonymous in Astronomy & Space

2007-12-04 04:22:59 · 5 answers · asked by Pastinie 3 in Chemistry

2007-12-04 04:21:05 · 1 answers · asked by Anonymous in Geography

Identify the vertex and the axis of symmetry of the parabola. Identify points corresponding to P and Q.

http://i3.photobucket.com/albums/y81/slipknotme/i0000039.gif

a.
(1, –2), x = 1;
P'(0, –3), Q'(3, –6)

b.
(–2, 1), x = –2;
P'(0, –3), Q'(3, –6)

c.
(1, –2), x = 1;
P'(2, –3), Q'(–1, –6)

d.
(–2, 1), x = –2;
P'(2, –3), Q'(–1, –6)

2007-12-04 04:16:47 · 4 answers · asked by Anonymous in Mathematics

Hello can someone help me with this question. Thanks
(Po)/(t+1)
Use your equation from part a to approximate how many years it would take for the population to reach 600. Round to two decimal places if necessary.
so i think it would be like this
600/(t+1)

2007-12-04 04:15:41 · 1 answers · asked by ViewSonic 2 in Mathematics

If you have a four digit code with 6 possible digits (1 - 6), where the number can be repeated, how many combinations are possible and why?

Thanks!

2007-12-04 04:13:13 · 4 answers · asked by anto687 3 in Mathematics

2007-12-04 04:10:43 · 12 answers · asked by Jay4our 2 in Earth Sciences & Geology

2007-12-04 04:10:23 · 4 answers · asked by allee010 1 in Physics

2007-12-04 04:07:26 · 8 answers · asked by Anonymous in Botany

(0.0002 microbar = 0.0002 millionths of an atmosphere.)

The sound of a nearby jet engine is typically 130 decibels referred to that sound pressure.What is the engine's sound pressure in bars(atmospheres)??

2007-12-04 04:04:24 · 1 answers · asked by Selim K 1 in Physics

Is this the correct?

f ' (x) = cube rt.(x) = x^(1/3)

F(x) = (3/4)x^(4/3)

2007-12-04 04:03:31 · 2 answers · asked by the Jam 2 in Mathematics

what is the size in inches?? im trying to create a cd cover on Illustrator and i dont know the size of the rectangle i have to make... please help

2007-12-04 04:02:24 · 2 answers · asked by Dave 2 in Mathematics

Hi everyone especially all u scientists
Right i am having huge difficulties with this question i have 3 hours to find an answer and its proving really tough so the quicker you answer the quicker i choose best answer mind you it has to be a good answer
cheers

2007-12-04 04:02:17 · 1 answers · asked by Anonymous in Chemistry

please post source, its for a history project

2007-12-04 04:01:17 · 2 answers · asked by Pretti iiN Piink 4 in Earth Sciences & Geology

is anybody out there serious about real, useful "alternative" science, "wind-up" radios, wind generators from old car parts etc?

2007-12-04 04:00:58 · 8 answers · asked by Anonymous in Other - Alternative