What is the de Broglie wavelength of a ball of mass 200. g moving ...

[Shelles]

What is the de Broglie wavelength of a ball of mass 200. g moving with a speed of 30. m/s?
 
  A) 1.1  10-34 m
  B) 4.5  10-28 m
  C) 6.67  10-28 m
  D) 2.2  10-34 m
  E) 6.67  10-31 m

Question 2

What is the most important role that the carbon dioxide cycle plays in the regulation of the Earth's climate?
 
  A) it removes carbon dioxide from the atmosphere produced by respiration
  B) it regulates the surface temperature by varying the amount of carbon dioxide in the atmosphere
  C) it provides carbonate minerals in the oceans for aquatic life forms
  D) it provides carbon dioxide in the atmosphere for photosynthesis

[mcomstock09]

Answer to Question 1

A

Answer to Question 2

B

[Shelles]

Wow, this really help

[sultana.d]

Thanks for the timely response, appreciate it