¿Cual es la causa de cualquier onda de sonido?

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.

Could we see a galaxy that is 20 billion light-years away?

Which best describes the difference between internal and thermal energy?