What is the main energy transformation (input and useful output) ...

[sjones]

What is the main energy transformation (input and useful output) for a person speeding up while riding a bicycle?
 
  A) kinetic E  chemical E
  B) thermal E  kinetic E
  C) chemical E  elastic E
  D) elastic E  kinetic E
  E) chemical E  kinetic E

Question 2

Regarding the validity of the law of conservation of energy,
 
  A) it is valid for any situation in which Newtonian physics is valid, but is often incorrect outside of that range.
  B) it is valid in all situations except those situations involving heat.
  C) this law is a consequence of Newtonian physics, and so this law is valid in every known situation because Newtonian physics is valid in every known situation.
  D) it is valid in every known situation--including those situations in which Newtonian physics is not valid.

[alexisweber49]

Answer to Question 1

E

Answer to Question 2

D

[sjones]

YES! Correct, THANKS for helping me on my review

[jojobee318]

Thanks for the timely response, appreciate it