Science & Mathematics - 26 January 2007

2007-01-26 17:47:03 · 9 answers · asked by Nadare 2 in Mathematics

Have we been visited by extra terrestrial.
I have stuided this for some time and i believe we are. What are your thoughts?

2007-01-26 17:46:58 · 11 answers · asked by ash7600 2 in Astronomy & Space

2007-01-26 17:41:50 · 6 answers · asked by Nadare 2 in Mathematics

2007-01-26 17:35:40 · 6 answers · asked by froigajudo 1 in Engineering

The tv and the News both tell me that there are now 52 states, pls inform me of what is going on! I know I grew up with only 50 states

2007-01-26 17:35:29 · 18 answers · asked by chianahp 1 in Geography

take (i)a beaker full of water,(ii)a beaker full of sand and (iii) a closed bottle containing a thermometer.keep them in bright sunlight for 3 hours.now measure the temperature of all 3 vessels.also take the temperature reading in shade at the same time.

2007-01-26 17:32:05 · 4 answers · asked by Shruti 1 in Chemistry

I just learned that our planet earth has another moon (a second one), I was reaaly suprised. Do anyone know its naem and a few specs on it?

2007-01-26 17:30:16 · 13 answers · asked by Vince B 1 in Astronomy & Space

2007-01-26 17:25:08 · 4 answers · asked by sam 1 in Physics

2007-01-26 17:22:22 · 12 answers · asked by ? 6 in Astronomy & Space

-x - 4y = -32
thanks

2007-01-26 17:20:58 · 7 answers · asked by dee free 2 in Mathematics

2007-01-26 17:18:41 · 5 answers · asked by Nadare 2 in Mathematics

3x - 2y = 6
one more
3x - y = -15
thanks

2007-01-26 17:17:32 · 5 answers · asked by dee free 2 in Mathematics

2007-01-26 17:14:35 · 1 answers · asked by Anonymous in Chemistry

2007-01-26 17:10:29 · 4 answers · asked by W 1 in Chemistry

For the following reaction to occur


MgSO4 → Mg2+(aq) + SO42−(aq)


the change in enthalpy must be −91.3 kJ/mol


How much heat (kJ) is lost or gained by 253.0 ml of water when 3.60 g of MgSO4 is dissolved in the water ?

2007-01-26 17:09:35 · 2 answers · asked by Anonymous in Chemistry

Say telescopes eventually find an Earth-like planet at Alpha Centauri or another nearby star.

Probably the first engineers will find a way to make 1% lightspeed possible, decide it's enough, and put people on a centuries-long trip in suspended animation.

Later, progressively faster and faster ships will pass them, and they can't do anything because it takes months to slow down and doing anything to catch them at that relative speed will vaporize them both.

So the first dudes will reach a fully formed civilization while the last ones have to do all the hard work. Weird eh?

2007-01-26 17:09:12 · 4 answers · asked by anonymous 4 in Astronomy & Space

If anyone can solve these problems(as much as you can),please write with steps.

1. How many factors of 2400 has?

2.Find the sum of first 20 terms of the series:
1^2 + (2^2+3^2) + (4^2+5^2+6^2)+........

3.Find the sum of first 25 terms of the series:
1+(1+6)+(1+6+11)+(1+6+11+16)+......

4.How many triangles can be formed by the angular points of an octagon?

5.CosecX = (a^2 + b^2)/(a+b)^2 - is it possible or not?Why?

6.If f(x)=x and g(x)=x^2, (fog)^(-1) (-4) = ? [fog inverse of -4]

7. log0 =? [base 3]

8.IF f(1-x)= x^2+2, f(4)=?

9.Find the factor of a^3+a+1

2007-01-26 17:08:54 · 2 answers · asked by Anonymous in Mathematics

2007-01-26 17:07:31 · 13 answers · asked by Anonymous in Weather

2007-01-26 17:04:34 · 3 answers · asked by alain d 1 in Astronomy & Space

i need it immediately, can u do it with explanation, thanks.. love lots and godbless

2007-01-26 17:01:52 · 4 answers · asked by mku1023 2 in Mathematics

how do you make the raw material for the philosopher's stone?

2007-01-26 17:01:21 · 5 answers · asked by Marquise H 1 in Chemistry

2007-01-26 17:01:21 · 4 answers · asked by Nadare 2 in Mathematics

we know n!=n(n-1)(n-2).....1 and n belong natural number

2007-01-26 16:55:57 · 2 answers · asked by Anonymous in Mathematics

2007-01-26 16:55:46 · 5 answers · asked by W 1 in Chemistry

f (x) = x^2 - 7x + 10; find (a) f (0), (b) f (5), and (c) f (-2).

Please show me how to complete this. Thanks.

2007-01-26 16:55:21 · 3 answers · asked by kali 2 in Mathematics

2007-01-26 16:54:42 · 1 answers · asked by kobe6915 1 in Earth Sciences & Geology

2007-01-26 16:53:43 · 11 answers · asked by ? 6 in Weather

A feed input stream (F) which consists of 35%EtOH and 65%water is channelled into a distillation column. At the lower end of the column, there is an output stream W which consists of 5%EtOH an d 95% water. At the upper end of the column, the stream is passed into a condenser where the distillate W comes out. W consists of 85%EtOH and 15%water.

How do you calculate the kg of D per kg of F and per kg ofW?

Can anyone pls help me. Thanks so much.

2007-01-26 16:51:09 · 1 answers · asked by sky_blue 1 in Engineering

2007-01-26 16:45:56 · 2 answers · asked by Smo 4 in Zoology

1) Plastic is melted and injected into a mold
2) Protein is digested in the stomach
3) A coal-fired power plant produces gases that cause acid rain
4) Dry ice sublimes into the air

2007-01-26 16:45:23 · 6 answers · asked by theweirdguy1 2 in Chemistry