A ray of light is incident on a body x what is the reftactive index

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.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

What are known as the properties of substances that describe a substance et does not change that substances?