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I know this kinda varies from year to year due to test difficulty, but approximately what marks am i looking at in the actual HSC exam solely to warrant me a 90 external mark in 4u? Also what would the approximate mark be if i was looking at a 93-94 external mark and also what mark for a 96-97...

Anyone have any views and opinions on this years budget? Also does anyone have any good essay questions in relation to the budget? Its coming up in our trials so anyone help is welcome

For the describe how Bohr's postulates led to teh development of a mathematical model to account for the existence of the hydrogen spectrum dotpoint, are we expected to derive Balmers equation? whats required

Title says it all. What book should i use to start learning mechanics. Brand new to the topic, which textbook should i start with