Widespread use of fossil fuels will probably result in warming ...

[gonzo233]

Widespread use of fossil fuels will probably result in warming Earth. This is due to
 
  A) the large amount of heat released by fossil fuels.
  B) increased acidity of the atmosphere.
  C) release of CO2.
  D) water vapor added to the atmosphere.
  E) release of CFCs.

Question 2

Three small objects are positioned at the following coordinates: the 3-0 kg object at (3.0 m, 2.0 m); the 4.0-kg object at (0.0 m, -1.0 m); and the 5.0-kg object at (5.0 m, -7.0 m). What are the coordinates of the center of mass of this system?
 
  What will be an ideal response?

[orangecrush]

Answer to Question 1

C

Answer to Question 2

(2.8 m, -2.8 m)

[gonzo233]

Excellent

[Liamb2179]

Thanks for the timely response, appreciate it