1. Every morning, an athlete jog around a 400-m oval track six times in 30 minutes. What is the athlete’s (a) average speed and (b) average velocity? 2. A body moving with a constant acceleration in a straight line was first observed to be moving at 4.5 m/s. After 10 seconds, it was moving at 6.8 m/s. Find its acceleration.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.