Which of the following statements about thermal radiation is ...

[anshika]

Which of the following statements about thermal radiation is always true?
 
  A) A hot object emits more X-rays than a cool object.
  B) A hot object emits more radio waves than a cool object.
  C) A hot object emits photons with a longer wavelength than a cool object.
  D) A hot object emits photons with a higher average energy than a cool object.

Question 2

Alone of all the Galilean moons, Callisto shows no sign of plate tectonics.
 
  Indicate whether the statement is true or false

[tkempin]

Answer to Question 1

D

Answer to Question 2

FALSE