The chances of getting a full scholarship for sports in any American college is just 1%. The sports are really just restricted to American football, tennis, basketball, volleyball, gymnastics and track and field.
Most tennis racquets are strung to between 50 and 70 pounds. Rackets with lower tensions give more power to the racket and less control. The opposite is found for higher tensioned rackets with are characterised by more control and less power.