Asked by joshua

In the operating
Room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients
undergoing surgery. One gas that is often monitored is the anesthetic isoflourane (molecular
mass = 3.06 · 10−25 kg). In a spectrometer, a singly ionized molecule of isoflourane (charge =
+e) moves at a speed of 7.2 · 103 m/s on a circular path that has a radius of 0.10 meters. What
is the magnitude of the magnetic field that the spectrometer uses?

Answers

Answered by drwls
Look up the formula for the 'Larmor' or 'cyclotron' radius of a particle in a magnetic field. It depends upon q, v and B.

It will let you solve for B.

If you can't find it in your textbook or derive it (which isn't hard), do a Google search. It will be a useful learning experience.

For a singly ionized molecule, q = e.

Hint: q V B = M V^2/R
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