ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: onlyfknhuman on November 09, 2008, 07:41:47 pm
-
Too what do we round our answers off too if not stated
And a question i found in 1996 exam ~ light matter section ~ what would happen to the MAXKE vs F graph when the same metal is used but light of double intensity.
What i know is that, intensity is proportional to current. and does nothing more then either, increasing the number of photons hitting the metal and increasing the current. So i thougth that the graph is unaffected by the intensity. However there is no option which it remains 'unaffected.'
and in a transition diagram. does ground state represent one wavelength , or zero.
-
For the rounding - if it's not specified aren't you meant to do it to the minimum amount of significant figures using in the equation? (eg. 20.05 x 40.0025, you do it to 4 sig figs, as that's the minimum) I've been told most of the time just to do to 2 decimal places, they only take marks off if you're +-1 away from what they want.
As for the EKmax vs f graph - I can't think of anyway it'd change just because of intensity - what was the papers answer?
-
the new line states that the max ke decreased slightly
-
the new line states that the max ke decreased slightly
How come?
Another dodgy + confusing ques.
-
wtf 1996 LOL
-
HAHHA LOL called redemption :D