Ared train traveling at 72 km/hr and a green train traveling at 144 km/hr are headed toward one another along a straight level track. when they are 950 meters apart, each enginneer sees the other's train and applies the brakes. the brakes decelerate each train at the rate of 2.0 m/s^2. is there a colllision? if so, what is the speed of each train at impact? if not, what is the separtion between the trains when they stop?

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.