Science & Mathematics - 13 July 2006

If we came from the sea by just being, then how is it we need a male and female to reproduce? If creatures just came from creatures then how did they split into male and female? How did that happen?

Like if a one celled animal came out of the sea, was it a male cell? Did it need a female cell to make another thing? At what point did these things decide they could not reproduce themselves? If they couldn't reproduce themselves then how did they come into being? If they could reproduce themselves then whe3n and how did that change to two things (male and female) to reproduce?

Bet I get called alot of names but no serious coherent answers.

2006-07-13 23:56:40 · 6 answers · asked by Anonymous in Other - Science

(dy/dx)=(xy-x+y-1)/(xy+x+2y+2) and (x^2y^2+x^2+y^2+1)dx=(xy+y)dy
fins the general solution of each

2006-07-13 23:56:00 · 3 answers · asked by Anonymous in Mathematics

I always wondered why there are 24 and not 20 hours in a day. Wouldn't it be easier for us all if there were 10 day-time hours and 10 night-time hours? So easy to show the time using our fingers, right?
And why 60 minutes in an hour? Why not 100 minutes?

2006-07-13 23:53:29 · 17 answers · asked by Anonymous in Astronomy & Space

My employer is of the opinion that sound has a tendency to travel downwards. I don’t agree as I don’t believe sound waves are affected by gravity.

2006-07-13 23:50:16 · 14 answers · asked by cov111 1 in Physics

2006-07-13 23:48:26 · 19 answers · asked by rod p 2 in Other - Science

I sustained a small phenol burn to my arm roughly 2cm square. swabbed with relevant solvent and rinsed with water. I am aware phenol is very toxic and wondered if anyone had any experience with phenol exposure?

2006-07-13 23:36:46 · 3 answers · asked by well_clever_i_am 3 in Chemistry

2006-07-13 23:27:10 · 19 answers · asked by Anonymous in Earth Sciences & Geology

2006-07-13 23:20:42 · 8 answers · asked by kat-dog 2 in Other - Science

2006-07-13 23:18:50 · 6 answers · asked by Anonymous in Botany

Please explain your answer.

2006-07-13 23:15:52 · 3 answers · asked by Jack 2 in Biology

Aquarium husbandry usually talks about feeding invertebrates in captivity. What I need are the requirements of inverts feeding in the oceans.

2006-07-13 23:06:28 · 4 answers · asked by wassermanner 1 in Zoology

factorize a ^ (n) + b ^ (n) and write the formula
in most simplest and general form
when n is an odd natural number.

2006-07-13 23:02:21 · 3 answers · asked by rajesh bhowmick 2 in Mathematics

Thank you for your prior answers.... I like the one about the Earth
moving... and that"s what makes the moon SEEM to move...

So, if the moon is actually not moving, but only a little per day, and, of course it is not spinning on its self... what keeps it hanging up there? not its movement...

And if it does not have an elevation of its own, are you implying that it is fix on the same orbit every month, and only changes in looks because of planet Earth movement only?

That would almost suggest that the moon is inert in the sence that
it would be a mere dead attachment ... kept soly up by a magnetic side (always the same side)...

And so... if the sun is the cause of the lit side, again I ask..WHY in the DAYLIGHT when the sun is high an the moon is a daylight moon, why isn"t this always a FULL moon than??

2006-07-13 22:59:30 · 2 answers · asked by Anonymous in Astronomy & Space

In the theory of evolution what came first, after the asexual critter or what ever it was, male or female?

2006-07-13 22:48:57 · 11 answers · asked by Anonymous in Biology

take the equation
a ^ (n) - b ^ (n) = d ^ (2) - c ^ (2)
here a,b and n is given which are natural numbers.
find the mathematical relationship between a,b & d,c.
d and c can be rational numbers also.
hint :- its very simple.

2006-07-13 22:47:23 · 8 answers · asked by rajesh bhowmick 2 in Mathematics

2006-07-13 22:42:47 · 13 answers · asked by rvn 1 in Mathematics

how it effects our Solar System and Earth when it reaches it.

2006-07-13 22:41:46 · 6 answers · asked by Explorer 5 in Astronomy & Space

2006-07-13 22:35:53 · 7 answers · asked by Vinoo C 1 in Biology

What does it mean by 'free standing' e.g The Stratophere tower in Vegas is the tallest free standing tower in the USA.

2006-07-13 22:27:43 · 5 answers · asked by Anonymous in Engineering

Let's say that another intelligent civilization came to Earth peacefully, just to strengthen their knowledge of the universe like we try to. If you had the chance, would you go with them as some type of ambassador from Earth to try to learn as much about them as possible and to one day return and teach mankind what you have learned? Would you go even if there was a chance of not being able to return?

2006-07-13 22:25:54 · 14 answers · asked by whosyodaddy3030 2 in Astronomy & Space

If there was something wrong with apes, and they needed to evolve why are they still here?

2006-07-13 22:23:48 · 7 answers · asked by Anonymous in Biology

2006-07-13 22:22:33 · 10 answers · asked by Capt.Corelli 1 in Geography

I am struggling with the analysis of my data. I am interested in hearing suggestions about how to improve that analysis.

I am performing an "Event Probability" study. I know the general "probability" of all possible events presented by my data. I have further scrutinized that data and calculated the probability of those same events given the occurrence of another event--a standard "conditional probability" analysis. After performing the "conditional probability" analysis, it is very clear which event is the most probable (let's call it the "Majority Event"). Typically, the "Majority Event" will have a probability of 35% whereas the remainder of events (let's call them "Minority Events") may have probability values of 15%, 13% etc.--which, in the end, is a hefty 65% of all other events in the aggregate.

Is there a way now, using some sort of "frequency analysis" formula or "distribution analysis" formula to determine "Likelihood" over and above probability.

2006-07-13 22:21:17 · 5 answers · asked by brian_hahn_32 3 in Mathematics

The difference between two numbers is 31.If 5 is added to the smaller number,the result is equal to half of the larger number.What is the sum of the two numbers?.....(this involves linear equations)...

2006-07-13 22:17:45 · 15 answers · asked by cUrIoSiTy 3 in Mathematics

Is it true that if everybody in china jumped up and down at exactly the same time the massive weight landing on the earth would be enougth to kick it off its axis thus sending us spinning into space?

2006-07-13 22:14:15 · 7 answers · asked by Malcolm M 2 in Earth Sciences & Geology

2006-07-13 22:14:08 · 40 answers · asked by Smudge 1 in Geography

given a^(n)-b^(n)=d^(2)-c^(2)
in the above equation a,b & n are given and
are natural numbers.find the relation between given a,b and n
with the unknown d and c where d and c
can be rational numbers.

2006-07-13 22:11:23 · 3 answers · asked by rajesh bhowmick 2 in Mathematics

relationship of mechanical energy and electrical energy
`detail steps about mechanical energy converted into electrical energy

2006-07-13 22:11:08 · 11 answers · asked by jamie j 1 in Physics

Whats the most out-of-the-way place in the U.K?

2006-07-13 22:10:24 · 38 answers · asked by Anonymous in Geography

Can someone explain in some-what simple terms what entropy is? I've read some things about it, but it's a bit hard for me to grasp.

2006-07-13 22:09:38 · 10 answers · asked by blah 2 in Physics