Homework, Part 1: a simple calculation
What are the resonant frequencies for protons on water molecules
at 3T, 7T, and 10.5T?

Remember that the resonant frequency is the gyromagnetic ratio times the 
field strength, and the gyromagnetic ratio for the proton is 42.58 MHz/T


Homework, Part 2:  

Write a single sentence interpreting those numbers.  Keep it to 1 sentence,
and just write something that gives them meaning.