Author Topic: The Age VCE exam guide (Read 637 times) Tweet Share

SamiJ · « **on:** September 19, 2011, 07:52:03 pm »

It's at this link

http://neutrinodata.s3.amazonaws.com/theage-education/userfiles/Physics.pdf

Lasercookie · « **Reply #1 on:** September 19, 2011, 08:32:57 pm »

Thanks for this.

It looks like this one has more useful information than the one they put out for Unit 3.

If anyone hasn't derived the equation for the dB to I conversions that it refers to, this is what I use:
$L = 10 log_{10}(\frac{I}{I_0})$

Log relationship: $y = b^x$ and $log_b (y) = x$

$\frac{L}{10} = log_{10}(\frac{I}{I_0})$

therefore: $\frac{I}{I_0} = 10^{\frac{L}{10}}$

$I = 10^{\frac{L}{10}} * I_0$

$I_0 = 10^{-12}$ (I think this is the value that VCAA gives on the formula sheets)

$I = 10^{\frac{L}{10}} * 10^{-12}$

you could go further and have:
$I = 10^{(\frac{L}{10}-12)}$

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Author Topic: The Age VCE exam guide (Read 637 times) Tweet Share

SamiJ

The Age VCE exam guide

Lasercookie

Re: The Age VCE exam guide

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