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test plastic, glass, graphite and iron

(x+2)^2 +(x-1)(x-7)=17 x^2+4x+4+x^2-8x+7=17 2x^2 -4x-6=0 \therefore (x+1)(x-3)=0 \therefore x=-1, x=3 $New question...$ $solve the following for x...$ x^3+3x^2-18x=0

ohh yeah, part c makes sense... good to know that a and b were correct lol... took me ages to type in LaTex but nevertheless your welcome

hmm.. well it is a semi circle with radius three... use the area of a circle formulaArea = \frac{\Pi3^2}{2}

lol so ur the guy who everone wants to ban LOLZOR... pick chem OP

sup... what school do u go to?

A) they basically give u the reaction $Equation one:$ $ $2NaOH+CO_2 \to Na_2CO_3+H_2O $Equation two:$ $ $Na_2CO_3+ Ca(OH)_2\to 2NaOH+CaCO_3 B) haven'r done PPM but will try... n_{CaCO_3} =\frac{1000x10^3}{40.08+12.01+3x16}= 9991.001 moles $ from the equations, n_{Na_2CO_3}=n_{CaCO_3}...$...

i liked frankenstein and blade runner is OK...

where are u going to buy permanent magents from? or are u planning to use an electromagnet.i don't think that three coils are needed for a standard HSC assesment

train is OK since it isn't rocky and stuff... bus just makes you sick and feel funny. and you can't write properly on a bus... so by the time you wait for the bus to stop at the lights, you only get like a 30 second period to work like a maniac then the bus starts moving. and by the end, its...

woow... thats trippy.. would of have never though of that. but wouldn't u get a square root of a -ve number as it is p^2? just a query

As X jim said, the first reaction shows the ionisation of and acid as H^+ is product (acids are proton donors). WEAK acids form STRONG conjugate bases. hence the unsatisfied STRONG conjugate base (A^-) then goes to water and asks for a hydrogen... due to how awesome water is, it gives the A^- an...

buy one off eBay... why complicate a simple task

and by current he means conventional. in 99% of cases, they will be talking about conventional current

hi.

hi

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its a rectangle with a semicircle on it

thread resurrection!

you certainly don't need engineering studies to become a dentist. chemistry will help you through uni... most courses have something relating to chemistry... i did engineering studies. i honestly found it quite dry. chem for me was interesting. maybe it is "f*n boring" becuase you find it...