The reason we have to scan more times (at least 60 times) a sample to obtain a decent C NMR instead of as few as 8 scans to obtain a H NMR is due to:

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.