Crash

Ok, so i just started hyperbolic trig at uni and although its sweet, i mean just the basics with a different name but im having trouble with a couple of q's sinh(2x)= 2sinh(x)cosh(x), for all xE|R d/dx(tanh^2(3x) = 6sech^2(3x)tanh(3x), xE|R 8sin^4(x)= 3-4cos(2x) + cos(4x), xE|R i need the working, actually even just a method or explnation would be much appreciated, Cheers

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Putriscene and cadaverine! Puck material

Calcium is this instance is +1, if it was +2 no reaction would take place. Im guessing this is just a hypothetical question posed by a high school chem teacher?

The square brakets mean to but not including and the rounded brackets mean up to and including

Its Meso because even though it has chiral carbons it still has a plane of symmetry

What level Physics are you in? find the horizontal component through trig, acceleration is 9.8 down, it will prob help to draw a picture

keep it closed

So just because it cant form molecules does that make it not an element? is that what you define as an element?

It shatters. im not quite getting what your trying to ask?! what do you mean? contain or seperate fires?

Lol, how stupid was i. Tetraneutron, found a few more links but damnd Windows crashed (yet again, damn XP)

I remember reading in a new scientist afew years back and it had element zero as its cover story, something about four neutrons together, nothing else, i think it started with T. Found these too... http://home.earthlink.net/~quade/elementzero.html http://www.newscientist.com/article.ns?id=mg17623694.700

Highly dangerous. Bahahaha, bizzaro

for a lewis acid, it is an acceptor of lone pairs of electrons, and for q2) i think thats what i got because Ba(OH)2--> Ba2+ + 2OH.

Oh, cheers for that

crazy stats (wheres the crazy smilie?), wonder if someone will do this on NZ, i hope so, i tink there is life out there, i just have no idea of what i would think it was intelligence wise, looks etc etc.

ok so i got for my result =x^2sin(x) + 2xcos(x) - 2sin(x) + c But when i derive this again to check the awnser i have a wrong sign somewhere and i cant find where and i been through over and over and over.... Is this the right intergral?

Lol, we did this lab at teh start of this semester for my organic chem class (aspirin not paracetamol)

Cant you have "real" and psuedo photons? the brief history of time talks about psuedo photons (cant be measured/detected) interacting with matter and a "real" photon is produced which can be detected

Ive got the question S x^2cos(x) dx But by using S u(x)v'(x)= u(x)v(x)-S u'(x)v(x) dx So using v(x)= Sin(x) and u(x)= x^2 Im left with x^2Sin(x)- S 2xsin(x) dx with the end part being a product also can someone help me?

Going back through highschool would be interesting for the boys with out clothes:) word Navajo!

In teh smoke detecors. i also believe Na can be obatined in the house, although purifying and containing it pose a very minute problem

Ive tried looking everywhere and i still cant find an awnser. i emailed a couple of professors at oxford and cornell to try to find some awnsers but im still waiting for the email back. maybe jdurg can come up with some awnsers

19/m/New Zealand

I was wondering with all the properties ive learnt about acids, why is it that H3PO3 is more acidic than H3PO4 when its got less electronegative atoms bonded to the central atom plus only two H's are bonded to the oxygens as opposed to H3PO4, can anybody explain this property to me?