Many amtrak trains can travel at a top speed of 42.0 m/s. assuming a train maintains that speed for several hours, how many kilometers will the train have traveled after 4.00 hours? round to the nearest km.

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.