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Science & Mathematics - 20 August 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

2007-08-20 02:32:31 · 11 answers · asked by wacey_19 1 in Physics

2007-08-20 02:28:09 · 0 answers · asked by Anonymous in Medicine

I am a 9th class student & want to know about subjects required in Aerospace Engineering.

2007-08-20 02:27:51 · 9 answers · asked by Anonymous in Engineering

2007-08-20 02:27:19 · 25 answers · asked by simon c 1 in Zoology

Do you believe magic exists ?
What can you tell me about it ?
Do you have some experience with it?

This is a serious question...if you can give a serious answer.

2007-08-20 02:25:17 · 12 answers · asked by Laff -Hugs 4all- 5 in Paranormal Phenomena

2007-08-20 02:23:22 · 3 answers · asked by aliiqbal_2005 1 in Engineering

2007-08-20 02:15:55 · 24 answers · asked by Anonymous in Zoology

If they can't move, how do they have sex with each other?

Where do tghey get pregnant, in the roots or the branches?

2007-08-20 02:14:09 · 12 answers · asked by Anonymous in Biology

2007-08-20 02:12:14 · 11 answers · asked by Anonymous in Geography

what are the types of chemical fertilisers?? and its effect to the environment and human's life?? could someone help me please...where can i find the source?
thanks

2007-08-20 02:12:13 · 3 answers · asked by n_n 1 in Chemistry

are human the only species ever on earth to commit suicide? does this give either side of the evolution debate any clout? does this have some special significance that we can comtemplate such a thing?

2007-08-20 02:08:52 · 5 answers · asked by BRYAN H 5 in Biology

2007-08-20 02:08:08 · 7 answers · asked by Anonymous in Mathematics

Graph the curve whose parametric equations are given and show its orientation. Also, find the rectangular equation of each curve.

(1) x = t - 3, y = 2t + 4, where t lies in the interval [0, 2].

(2) x = sqrt{t} + 4, y = sqrt{t} - 4, where t is greater than or equal to 0.

2007-08-20 02:04:35 · 2 answers · asked by journey 1 in Mathematics

When forming complex ions with vaious transition elements and ligands like NH3, Cl- and SCN-, OH-, i noticed something peculiar.

When i added a ligand solution and glucose to a transition element, it acted differently to when it was mixed with just the ligand. I'm not sure as to why this would be, can any one help?

2007-08-20 02:00:43 · 2 answers · asked by Anonymous in Chemistry

I come from the Religion and Spirituality section
Need to know how far the word has spread of the Troll patrol ?

2007-08-20 01:55:14 · 6 answers · asked by Laff -Hugs 4all- 5 in Paranormal Phenomena

I'm just checking whether someone I know was telling the truth, when they said they went to the beach.
And yes, the question includes the moist sand, or the part of the sand which is reached by the waves.

(The whole story is irrelevant to tell here).

2007-08-20 01:52:11 · 6 answers · asked by Anonymous in Biology

It's just so hard for me to comprehend. I know the universe is huge, but how could there be an end to it? Would you just hit a wall and if so what is on the other side of the wall? They say some day that the universe may implode. If so what would be there. There has to be something still there. It cannot just go away.

2007-08-20 01:49:38 · 8 answers · asked by Anonymous in Physics

Let me know about other duty classes.

2007-08-20 01:32:08 · 6 answers · asked by SUJAY 1 in Engineering

How long would it take to reach Earth (if shined from he Moon for example) and what would happen?

2007-08-20 01:31:51 · 4 answers · asked by USAROX 1 in Physics

The measure of angle A is 9 more than twice the measure of angle B.If angle A and angle B are supplementary angles.

2007-08-20 01:26:50 · 7 answers · asked by ??unknown?? 1 in Mathematics

when we must use dry ashing and when we must use wet ashing?

2007-08-20 01:26:05 · 3 answers · asked by thereddevil_mania 1 in Chemistry

I thought the sea was a rich source of that nutrient?

2007-08-20 01:26:02 · 4 answers · asked by Anonymous in Chemistry

Does anyone know of a chemical that will raise pH without affecting Alkalinity? I found an identical previous question from someone else and the answer was Borax. I tried that and for some reason, in my pool, it raises both readings 8 lbs of Borax raised the pH to 7.2 and the Alkalinity to 180.

2007-08-20 01:16:36 · 1 answers · asked by Anonymous in Chemistry

A 15 kg mass hangs in the loop of a light inextensible cable, one end of the cable being fixed and the other wound round a wheel of radius 0.3m and moment of Inertia 0.9 kgm^2 so that the lengths of the cable are vertical. The mass is released from rest and falls, turning the wheel (take g=9.81). Neglecting friction between the mass and the loop of the cable and between the wheel and its bearings, find:

a relationship between the downward velocity of the mass, v, and the angular velocity of the wheel, w.

the speed of the mass when it has fallen a distance of 2m

the number of turns of the wheel before it reaches a rotation rate of 300rpm

2007-08-20 01:15:44 · 4 answers · asked by Anonymous in Physics

According to the traditional crystallography, there are 7 crystal systems that include cubic, tetragonal and orthorhombic systems. Under the 7 crystal systems, there are 14 Bravais lattices.

2007-08-20 01:06:51 · 3 answers · asked by MANGO 1 in Chemistry

I read something in a science journal recently about how that solid matter (I.e. atoms) can arise from fluctuation in background vacuum energy every so often. Can anyone tell me more about this? Also does anyone know anything about the boltzmann brain theory?

2007-08-20 01:03:24 · 3 answers · asked by westillsellbunny 1 in Physics

Not the changes. HELP!

2007-08-20 01:01:47 · 2 answers · asked by yello-jello 2 in Chemistry

2007-08-20 00:55:56 · 4 answers · asked by connie w 1 in Weather

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