To score in the 85th percentile at age 15 in the President's Challenge, girls must A. complete the shuttle run in 9.0 seconds
B. run a mile in 8:08
C. complete 11 pull-ups
D. perform 57 curl-ups in 60 seconds

thermal energy is the answer

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

answer: d. objects on jupiter experience more gravity due to more gases