C in AP Physics: Any hope?

<p>I received a C in AP Physics first semester senior year, the first time my semester grades have strayed from straight A's. My water polo team did way better than expected this year and it ended up being more time intensive than in previous years (in which my team had little post-season competition). Combined with my apparently mediocre grasping of physics concepts... well.</p>

<p>I am applying to Williams, William & Mary, Amherst, Vanderbilt, Dartmouth, Brown, University of Washington, UC Berkeley, UCLA, UCSD and University of Sydney.</p>

<p>ECs:</p>

<p>Girls' State,
UN forum,
brought free trade products to my school,
founded/led the Amnesty international chapter at my school,
school concert band 4 years + marching band,
4 years varsity water polo,
wrote for the newspaper</p>

<p>Community service:</p>

<p>lots of hours
service trip to Nicaragua
tutoring</p>

<p>What sort of impact will this grade have on my chances for RD admission? </p>

<p>(Will it destroy me from within or will it be nothing more than an unsightly bump on my App?)</p>

<p>Thank you for your feedback!</p>