In his sophomore year, Kerry became the Chairman of the Liberal Party of the Yale Political Union, and a year later he served as President of the Union. Amongst his influential teachers in this period was Professor H. Bradford Westerfield, who was himself a former President of the Political Union. His involvement with the Political Union gave him an opportunity to be involved with important issues of the day, such as the civil rights movement and the New Frontier program. He also became a member of the secretive Skull and Bones Society, and traveled to Switzerland through AIESEC Yale.
What was Kerry's role in the Yale Political Union as a sophomore?
Chairman of the Liberal Party

ReplayGain is a standard for measuring and storing the loudness of an MP3 file (audio normalization) in its metadata tag, enabling a ReplayGain-compliant player to automatically adjust the overall playback volume for each file. MP3Gain may be used to reversibly modify files based on ReplayGain measurements so that adjusted playback can be achieved on players without ReplayGain capability.
MP3Gain is important because it allows players without what capability to have adjusted playback?
ReplayGain capability

The United Nations estimates that the population in 2009 was at 154,729,000, distributed as 51.7% rural and 48.3% urban, and with a population density of 167.5 people per square kilometre. National census results in the past few decades have been disputed. The results of the most recent census were released in December 2006 and gave a population of 140,003,542. The only breakdown available was by gender: males numbered 71,709,859, females numbered 68,293,08. On June 2012, President Goodluck Jonathan said that Nigerians should limit their number of children.
How much of Nigeria's population in 2009 was rural?
51.7%