Science & Mathematics - 7 September 2007

Two protons or neutrons in the same system that have identical quantum properties can not exist, thereof, why/how do "Tetraneutrons" exist because IOW standard model of particle physics tetraneutrons simply can't exist?

2007-09-07 16:37:50 · 2 answers · asked by r3d410nis 2 in Physics

2007-09-07 16:34:31 · 8 answers · asked by Anonymous in Physics

Suppose you provide some fruit or vegetable plants with sunlamps to provide sufficient light and fertilize the soil to provide sufficient nutrients.

BUT-- cycle the lights on and off on a faster schedule than 24 hours. Say, a 6 hour day/6 hour night, giving them all the light and nutrients in 12 hours they'd get in an ordinary 24 hour cycle.

Can we get plants to 'accelerate' their growth/ growing season...? Plants don't need to 'sleep', do they...?

I imagine they might only produce stunted or dwarf fruits or vegetables, but how much could we speed up their growth? Shorten the growing season...? Anybody know of any research on this?

If this isn't clear, ask and I'll provide more details.

Please, serious answers only! thanks!

2007-09-07 16:33:06 · 3 answers · asked by cdf-rom 7 in Botany

so here goes the equation :

√3^p + 1 = 2^p.
I know the value of p is 2 .But what is the correct process of solving it?
thanks in advance.

2007-09-07 16:31:41 · 7 answers · asked by Shouvik 2 in Mathematics

What store would sell glass piping?

2007-09-07 16:29:21 · 2 answers · asked by Anonymous in Chemistry

2007-09-07 16:25:09 · 22 answers · asked by litlegrlblue1 1 in Zoology

The measure of the area of the square is 81-90x+25x^2 where x is a positive integer. What is the smallest possible perimeter measure for the square?

2007-09-07 16:22:48 · 5 answers · asked by beth 1 in Mathematics

my assignment is to draw a restriction map of the fragment and show distances, in base pairs, between HindIII, SmaI, and EcoRI.
A 1000bp EcoRI restriction fragment (linear) contains a gene you are interested in. first, construct a restriction map of the fragment using the enzymes SmaI & HindIII.
HindIII cut at 700bp & 300bp; SmaI cut at 800 & 200.

2007-09-07 16:22:45 · 1 answers · asked by LINDA 1 in Biology

A particle moving along the x axis is located at 13.3 m at 1.77 s and at 4.25 m at 3.47 s. Find its displacement during this time interval? (answer in m)

2007-09-07 16:20:36 · 5 answers · asked by Cnall 1 in Physics

Can you please show all working out, this is only about 20% of my question. I need the working all to be able to complete the rest.

1) What mass of solute is needed to prepare:

a) 500mL of 3.0M HCl

2) Vinegar is a solution of acetic acid (CH3COOH) in water. If 200mL of vinegar contains 8.0g of acetic acid. What is the molar concentration of acetic acid in vinegar

3) A compound has the following percentage composition by mass: 32% carbon 6.7% hydrogen 18.7% nitrogen and 42.6% oxygen

Find the empirical

8) A hydrocarbon contains 90% carbon and 10% hydrogen. Find the empirical formula.

2007-09-07 16:17:21 · 5 answers · asked by Anonymous in Chemistry

2007-09-07 16:15:58 · 19 answers · asked by Anonymous in Zoology

And people anywhere are only poor, old, sick, hungry, thirsty and die because they have inacurate beliefs about the way the world around them works and how it could work?

2007-09-07 16:14:23 · 11 answers · asked by Stan S 1 in Physics

determine quadrant in which each angle lies
1) pi/5
2) 7pi/5
3) -pi/12
4) -11pi/9

i don't understand how to get the answer at all :( please help

2007-09-07 16:08:33 · 7 answers · asked by snowangels 2 in Mathematics

2007-09-07 16:03:11 · 9 answers · asked by flossymae 2 in Astronomy & Space

Hi,
I need to integrate the following using indefinite integration
I'd be really thankful if any one would be able to help me with any of the question


1] sin4x*cosx*cos6x

2] ( 1 + sin x ) ^ 1/2

3] 1/(sinx*cosx)^2

4] tan x / ( 2(tanx)^2 + 1 )


5] ( 1 + sinx ) / ( 1 + cosx )



Thanks a lot in advance.

2007-09-07 15:59:32 · 1 answers · asked by > FREAK < 1 in Mathematics

2007-09-07 15:54:28 · 2 answers · asked by Mike G 1 in Biology

can anyone solve this for me for X
for me all these numbers and pi are so intimidating...
and i keep gettin a huge number and that just does no seem right to me...
SOMEONE HELP!!!

100,000= X * [(1320-2x) / pi] + {pi * [(1320-2x)/pi]} / 4

2007-09-07 15:46:32 · 5 answers · asked by joetterb 3 in Mathematics

a. CL
b. O-
c.Br-
d.Cl+

Can someone please explain electronic configurations in laymen's terms (if possible?) I'm clueless!

2007-09-07 15:46:03 · 5 answers · asked by kleo 4 in Chemistry

12-(5-2)+3

2007-09-07 15:39:34 · 11 answers · asked by Anonymous in Mathematics

12, 20, and 35

2007-09-07 15:39:26 · 12 answers · asked by mae 1 in Mathematics

such problems are like barriers and can be solve with an invetion which have noit been invented. ideas must be original and creativity. kindly give me an answer asap in need thanks

2007-09-07 15:32:52 · 3 answers · asked by RuN oF dEaTh 1 in Engineering

How would you set up an equation for this word problem?

The perimeter of a square is 12 meters greater than the perimeter of another square. Its area is 45 square meters greater than the area of the smaller square. Find the perimeter of each square.

2007-09-07 15:25:26 · 6 answers · asked by Jae 3 in Mathematics

Okay, so I'm taking Biology this year, and one of the students asked the teacher how we developed a conscience. My teacher said something like our brains evolved over time or something, and then she changed the subject. It didn't sound very convincing.

I honestly don't understand how people could have developed good and bad all by themselves. Like killing a man is wrong type of thing. Like how did humans develop justice? How do we know what is right and what is wrong? And why do some people have different rights that are wrong to others? And how do we know Hitler wasn't right and we're wrong? Since we're ever changing animals wouldn't we have just maintained what the other animals considered good or bad? Could you please explain how it happened?

I simply ask because I want to be able to defend what I believe.
Thanks much.

2007-09-07 15:22:08 · 6 answers · asked by Anonymous in Biology

2007-09-07 15:19:15 · 11 answers · asked by shy one 2 in Mathematics

Is there a limit to how bright something (like a light source) can be? If so what is it, and why?

2007-09-07 15:17:18 · 3 answers · asked by frogster99 2 in Physics

Is it a tornado, hurricane, flood, tsunami, what?? It can be anything weather-related. Mine was tornado. I heard wind, thunder and obviously rain. I looked out my window and all I could see was dust and dirt and plants, like I was buried underground...freaky... after the storm, it was gold outside... I'm serious.... gold...

2007-09-07 15:09:30 · 6 answers · asked by Anonymous in Weather

Is there ANY way that general relativity helps us people today? or like does it help NASA in any way?!
I'm desperate..i just need to know how general relativity helps us even in the littlest way.

2007-09-07 15:01:23 · 6 answers · asked by Anonymous in Physics

For example, 0.08% I have no idea where to start so any help is appreciated.

2007-09-07 14:55:30 · 5 answers · asked by Violet S 1 in Mathematics

okay, so if i took 1 cough/cold pill this morning around 6:30, and 2 antihistamine pills this afternoon around 3:00, is it okay for me to take an ibuprofen now (at 7:00 PM)? like will there be any synergistic effects or anything?


thanks.

2007-09-07 14:55:23 · 4 answers · asked by emily.grace 3 in Medicine

Why irrational numbers can be termed as decimal prime numers?

2007-09-07 14:54:30 · 3 answers · asked by sajesh.k 2 in Mathematics