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Physics B Curve

ChalmydiaChalmydia Registered User Posts: 76 Junior Member
Our Physics B teacher gave us the released "2012 Physics B international exam" (link below)

and the curve for a 5 is 129/180.
However, on the 2009 released exam, for example, the curve is 111/180 for a 5.

What gives? Did they really change the curve that much, or do they just curve "international exams" harder?
And to anybody who took the Physics B exam this year, what do you think the curve would be around for a 5?
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