challenge: What is the relationship between the resolving power of an Orbitrap analyzer and the m/z value?
  
  A. The resolving power is independent of m/z
  B. The resolving power is directly proportional to the square of m/z
  C. The resolving power is inversely proportional to the square root of m/z
  D. The resolving power is directly proportional to the cube of m/z
  Answer: 