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No problem :).

Conquering Chemistry Website: http://conqchem.cci.net.au/PCerrors06.htm

Note: because the water is the outer part of the fibre (I think), the water had to be less dense than the test material i.e. have a lower refractive index and therefore be equal to n2.

sin i / sin r = n2/n1, i=64, r=90, n2=1.33, n1=? sin64/sin90=1.33 / n1 sin90/sin64= n1 / 1.33 sin90 x 1.33 / sin64 = n1 = 1.48

Errors in Conquering Chemistry Preliminary Course 4th edition p. 90 right-hand column of table, 6th row: change 1.14 to 1.13 (should read 1.5 to 1.13) next row (starting assess separation ...): change 1.13 to 1.14 p. 113 equation (4.2): Should be just Cu2S (not...

Could you show workings? :)

Will do.

Yeah I got 0.362t. Book says 0.26t so must be a typo... thanks :)

Hey could someone else please do this question and post their answer? I think the BOB might be wrong: What mass of sodium would be produced from the electrolysis of 1.00 tonne of molten sodium chloride if the electrolysis process was 92% efficient?

So triangles BZC and ACY are congruent due to SAS. Thanks :).

No... I said 'I once saw someone spell weird incorrectly'. Which is correct. Lol dw about it

Hey guys So I am having trouble with part ii of this question. I can do everything including proving that AY = CX but I can't prove that BZ = AY =CX. I'd appreciate some help. Thanks.

spell weird incorrectly.

Really? :(

This ^. But if you can I'd say give it a go. You don't seem to be enjoying PDHPE and Physics is a great subject. I disliked Physics all the way up until Yr10 when all of a sudden I started to enjoy it and this year it's great.

Same :)

:jawdrop:

:/

http://www.youtube.com/watch?v=S5FCdx7Dn0o Listen to some Bob Marley rawrliongirl... that'll cheer you up

Pfft...