The Effect Of Temperature On Football
I am choosing to study how the PSI (pounds per square inch) of a football is affected by the temperature. I chose to study this because I like football and I always pondered this question. I believe that this is a worthwhile question to study because these studies can help improve the game as the weather gets colder.
As air cools, it expands, so when a football gets colder, the air inside it expands. This expansion causes the air pressure to decrease. The air pressure decreases because the molecules move less. The molecules move less because the air is cold. So as the weather cools down, the ball will be lighter and softer. In fact, for every 12.2°C (10°F) drop, the PSI decreases by .23 kg (.5 lbs.). This experiment has been done by Lily Johnson.
As air cools, it expands, so when a football gets colder, the air inside it expands. This expansion causes the air pressure to decrease. The air pressure decreases because the molecules move less. The molecules move less because the air is cold. So as the weather cools down, the ball will be lighter and softer. In fact, for every 12.2°C (10°F) drop, the PSI decreases by .23 kg (.5 lbs.). This experiment has been done by Lily Johnson.