The boundary shown is that of a uniform magnetic field directed in the positive z direction.An electron enters the magnetic field with a velocity pointing along the x axis and exits 0.63 μs later at point A.What is the magnitude of the magnetic field? 
Definitions:
Neo-associationist Analysis
A psychological theory suggesting that emotions and behavior are the result of complex associations formed through experiences.
Excitation-transfer Model
A psychological theory suggesting that arousal caused by one stimulus can be transferred and add to the arousal elicited by a second stimulus, intensifying the overall emotional experience.
Vicarious Learning Theory
A theory suggesting that people can learn new behaviors or information by observing others, also known as observational learning or social learning theory.
Cathartic Hypothesis
The idea that expressing or venting emotions, particularly anger, can relieve stress or improve psychological health.
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