context: The Chargers flew to Arrowhead Stadium for a Week 7 fight with their AFC West rival, the Kansas City Chiefs.  In the first quarter, San Diego fell behind early with KC QB Damon Huard completing an 11-yard TD pass to TE Kris Wilson and a 21-yard TD pass to WR Eddie Kennison.  In the second quarter, the Chargers got on the board with kicker Nate Kaeding making a 39-yard field goal, yet Kansas City would respond with an 11-yard run by RB Larry Johnson.  Kaeding made a 31-yard field goal for San Diego to end the half.  In the third quarter, both teams swapped touchdowns, as QB Philip Rivers threw a 1-yard TD pass to TE Antonio Gates, while Johnson got a 1-yard TD run.  In the fourth quarter, RB LaDainian Tomlinson caught a 37-yard TD pass and then threw a 1-yard TD pass to TE Brandon Manumaleuna.Kansas City  Chiefs kicker Lawrence Tynes's was good on a 53-yard field goal to seal the win for Kansas City, dropping San Diego to 4-2.
question: In the second quarter, how many yards longer was Kaeding's first field goal than his second?
answer: 8