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oh, I thought he was serious.

you can't come up with a formula for anything. Those two formulae you stated have got nothing to do with anything. They only like to see formulae when it is relevant. In this case it is not. You can only talk about how Einstein believed that science should be removed from social and political...

it's got to be b. c only deflects the electrons to direct them. The screen doesn't do anything except show where the electrons are hitting and the heating filament only releases electrons.

even if you don't know that formula, think about it this way. frequency is cycles per second. So you know that one cycle is 0.02 micro seconds. ie: f = 1 (cycle) / 0.02 (microseconds), convert to seconds and just do that division. You can use that for any measurement per another...

There isn't anything necessarily wrong with that. In that case, a can equal anything except 0. Even then, you won't be able to divide by zero, but if a = 0 then ab = 0, and 2a = 0. So if b = 2 then the statement is still correct because 2*0 = 0. In that case b could equal some other number as...

actually you would only have to imagine the roots in an extension 2 class. Some people in my extension one class don't have to imagine the roots, just me in the extension 2 class.

I have a good one. The integral of 1/cabin dcabin = log (cabin) + C = house boat.

everything you said may be algebraically correct, but you are still dividing by 0. Of course you did nothing wrong in the algebra. But my teacher agrees with me about dividing by zero, as does someone who did four unit last year. Not that I need a teacher to agree with me, you have divided by...

Monitoring and Management is getting boring so far. Titrations was fun in the last topic. But so far I think year 12 is much better than year 11.

it's probably a little bit late now. But I think a radical is an ion floating around on its own. Sort of like when you mix Na and Cl you get NaCl, and the Na has a positive charge, but it's on its own without the Cl (I might be wrong, someone correct me if I am, I also don't think it can happen...

my teacher told me you are allowed to use any legitimate maths in the exam. Even if it isn't part of the syllabus. So if you know some uni maths you can use it in the exam if you want. As for integral of cos^2 x. My textbook has a formula for it. You can do it from cos2x which gets you there...

actually, if a=1 and b=1, then a=b, so dividing by a-b is dividing by zero. You can't divide by zero which is the fundamental flaw in that proof About 1+1=2. I thought that it was just that by definition. We just define our set of numbers (starting at 0) as 0, 1, 2, 3, 4... etc. Two is one...

this might help. Thanks.

woh, no way. I'm doing exactly the same essay. This is a hard topic. I don't really get it either. I'm just going to ramble on I think. I found a couple of other good texts. What I'm doing is defining history and memory, my next point is "History without memory is merely a collection of facts"...

it's identify oxides of non metals, not as. Maybe that was just a typo. It says describe the conditions, so you have to be able to describe them. The conditions are just that they have to be dissolved in water, because NO2 isn't an acid on it's own. It's when it get's dissolved it turns into...

you have a lot to learn. But you mostly need to know year 12 stuff. So if you know that stuff you'll be mostly right. The other thing you probably need to know is naming straight chain alkanes and alkenes and alkanols. The prefixes in order from one to eight are: meth, eth, prop, but...

they are some big dot points. If you don't understand them maybe you should ask your teacher or read you text book. For the second one it's stuff to do with how more than 20% ethanol can damage cars, ethanol burns with less energy per mole released than octane does, ethanol is a green fuel...

I was under the impression you could just mash up some plants and add yeast and it would produce ethanol. Is that wrong? Does it need to be in the form of sucrose or glucose before it can ferment to make ethanol?

if you want to know whether it conducts then I suppose either will work because a voltmeter will tell you the voltage across the cell, and an ammeter will tell you how much current is flowing. Depending on the type of voltmeter you use, some can't be negative because the needle only has a...

If the H2SO4 draws out water, and it's a catalyst to the hydration of ethene you would want less of it, ie. lower concentration. Because if the hydration is given by: H2O + C2H4 --> C2H5OH (is that the formula of ethanol?) If sulfuric acid draws out water, then it will take the water away...