If NASA wants to put a satellite in a circular orbit around the ...

[Caiter2013]

If NASA wants to put a satellite in a circular orbit around the sun so it will make 2.0 orbits per year, at what distance (in astronomical units, AU) from the sun should that satellite orbit? The earth's orbit is 1.0 AU from the sun.
 
  A) 7.6 AU
  B) 0.63 AU
  C) 0.50 AU
  D) 2.0 AU
  E) 0.71 AU

Question 2

According to the nuclear energy curve, would fusion or fission or neither release nuclear energy from carbon atomic number 6, and why?
 
  A) Neither, because all other elements have higher nuclear energies.
  B) Fission, because then the reaction products have lower atomic numbers and a higher nuclear energy.
  C) Fission, because then the reaction products have higher atomic numbers and a lower nuclear energy.
  D) Fusion, because then the reaction product has a higher atomic number and a lower nuclear energy.
  E) Fusion, because then the reaction product has a lower atomic number and a higher nuclear energy.

[zhanghao]

Answer to Question 1

B

Answer to Question 2

D

[Caiter2013]

Excellent

Gracias!