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20.27 A 9Be nucleus containing four protons and five neutrons has a mass of 1.50

ID: 2110432 • Letter: 2

Question

20.27

A 9Be nucleus containing four protons and five neutrons has a mass of 1.50E-26kg and is traveling vertically upward at 1.70km/s.


A. If this particle suddenly enters a horizontal magnetic field of 1.25 T pointing west to east, find the direction of its acceleration vector the instant after it enters the field. (eastward? westward? southward? northward?)


B. If this particle suddenly enters a horizontal magnetic field of 1.25 T pointing west to east, find the magnitude of its acceleration vector the instant after it enters the field.

Explanation / Answer

A) The direction is North


B) F = q*v*B so a = q*v*B/m


= 4*1.60x10^-19*1700m/s*1.25/1.50x10^-26 = 0.91x10^11m/s^2