The surface of Venus is much hotter than the Earth because it ...

[nautica902]

The surface of Venus is much hotter than the Earth because it
 
  A) has no magnetic field
  B) has a very thick atmosphere of carbon dioxide
  C) has a much higher rate of volcanic activity
  D) is closer to the Sun

Question 2

A 2.0 kg mass is attached to the end of a horizontal spring (k = 50. N/m) and set into simple harmonic motion with an amplitude of 10. cm. What is the total mechanical energy of this system?
 
  A) 0.02 J
  B) 25 J
  C) 0.25 J
  D) 1.00 J
  E) 2.5 J

[tdewitt]

Answer to Question 1

B

Answer to Question 2

C