Crash

Im having some difficulty in grasping how to do the cover up rule with 3 factors as the denominator,

Like (x-2)/(x+1)(x+2)(x+4)

For the x+1 factor would i put -2 in for the (x+4), -4 in for the (x-2) factor and that would solve for the numerator, how do i do it, can someone give me a good explantaion on how to do it

Cheers

I think thorium for me, it contains alot of energy

Yea sorta, remember to form ions an atom will try to get its outer octet closer to the nearest noble gass electronic structure, bt you can tell just by looking the first method i used was to take the say Fe2O3 i would put the 2 from the iron as the oxygen ion charge and the 3 for the oxygen as the iron ion charge

The 11-dimensions (actually' date=' they include our everyday 4, so there are fewer) are so small that they cant really have any meaning attatched to them, other than as mathematical properties that allow strings to oscillate in the variety of complex ways they need to in order to create the physics we observe.[/quote']

I highly disagree with that, have you any evidence to back up the claim that they have no meaning but to mathmatically allow strings to vibrate in a miriad of ways? I would say they are of huge consequence,

To try and picture these 7 extra dimensions its like looking at a piece of paper, it looks 2D but as you get closer to it you notice that its alot more than 2D,

the real queation is why are the other 7 dimensions so small when 4 of them are so large?....cant wait till im like 50 when string theory is broken or hailed and all the math is there to prove it

By survival of the planets you mean still mass's just moving around the sun?

Hey Dave is there a chance that jupiter will ignite i remeber reading a year or so ago that jupiter isnt too far from being able to sustain itself as a sun, would this be possible in the event of our supernova?

anode is negative and cathode is positive

Quarks are said to be point particles, that is the have no volume like ..a point, string thoery says these point particles are actually not particles at all but vibrating open or closed end strings

The groups of particles are Bosons (force carrying particles of spin 0,1,2...), Fermions (matter constituents of spin 1/2,3/2,5/2..)But there are leptons like electrons and then there are quarks in the fermions group.Of which everything comes from e.g a proton is two up quarks and one down quark, sss, udd, etc etc

Note, these always combine to have no colour to be stable, although not in the every day sense of colour as light of visible wavelength is far too big

Aromatic

Carbonyl

Amine

Alkene

I'm pretty sure that phenyl is used only for benzene rings substituted at only one postition[/b']. I don't think it applies to fused heterocyclic compounds. Aromatic ring or benzene ring would be more accurate.

Too right

Max Planck, Eriwn Schrodinger and Hendrik Lorentz are y faviourtes

(220mph winds, 800degrees f, sulfuric acid clouds,

Harvey birdman, that naturally produces NaOH, can burrow with great ability and has metillic armor ( being made of metal to weigh it down from being blown away, like a lead peg leg or sutin, arrrr

Hey' date='

 

if anyone reads this within the next hour could you please help

 

What class of organic compound is hydrolised in aqueous acid to produce a carboxylic acid and an amine?

 

a acetal

b ester

c imine

d anhydride

e amide

 

i thought it might be b but im still unsure

 

please help

 

t[/quote']

 

does it just state what you have for abcd and e? no like 1-amine butanoate?

if it dosent i would go for the e because amides get rid of the amine and you got an aldehyde, reduce it further and you got a carboxylic acid and an amine. OH would substitute the NH2 group giving the O=C-OH

well e^x differentiated is itself but you bring the power down and differentiate that, thats where the cos(X) comes from

Im just working through and i did not get a trivial solution (ie no x=0) does that mean im doing it wrong?

Ive got

A=(3 4 7: 0

1 0 2 : 0

1 4 3 : 0)

I reduced that to

=(3 4 7 : 0

0 -12 -19 : 0

0 0 -5 1/3: 0)

that cant be right can it?

Do i continue to reduced row echelon form and i will get the trivial solution am i on the right track?

So i put the matrix = to 0 and then just solve for the variables?

Ok so i got the inverse down real good now thanks, but i dont quite know what is meant by finding the solutions of a homogenous equation (find the null vectors)

is that when i put the identity next to it then work through and find a matrix that will give general solution or is that when you solve for Ax=0 and then find the non trivial solutions?

Is the inverse of a matrix just one over the determinant times the transpose of the matrix?

yes please that would be much appreciated

Part of my course im doing at the moment is looking at how to determine the inverse of a matrix but i just cant seem to get it, could someone explain how this is done, not in the ways by reducing the to an identity (as i know how to do this) but the proper way where a colomn and a row are deleted.......and something could someone explain this in lamens to me pls?

Heres a Matrix to use as an example C=(1 5 3,4 4 3,2 1 1)

cheers all

you know when you get muscle twitches, like little spasms what causes them?

Ive gotten muscles twitches for awhile but i dont know why they are caused, and my eyelid (only the one) has quite frequent spasms now whioch started just a couple of weeks ago, can anybody explain why this is?

Cheers

Wavelength, my bad

[edit] what types of waves are you talking about? Light, sound, water?

eh, give me all of them. Wouldn't they all be similarly related? If not just give me a random list of a few. And spell out the words cause i'm not a chemist. Thanks for the help.

CH3-(CH2)5-CH3 septane

CH4 methane

CH3-(CH2)7-COH2 non-1-ol

C4H10 butane

CH3CH2-O-CH2CH3 Diethyl ether

CH3(CH2)6CH3 Octane

CH3(CH2)1000CH3 .....?.....

what do you mean by oil? its consistency/Physical properties? Hydrocarbon by nature?

nothing should happen to the amplitude of the waves just the frequency will shorten

ah, what oil are you referring to, crude? SAE30? 50W/80?

You could measure the reaction rates against a known standard but this would have to be very tightly done for temp etc.etc.

how did you purify it? using freezing techniques to isolate it out?