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A particle's dynamics are considered "relativistic" when its velocity is a significant fraction of the speed of light.  For example, the mass of a moving particle seen by a stationary observer increases in proportion to the square root of 1/(1 - (v/c)2).  For typical speeds in the everyday world it is not noticeable, but take a fast moving fundamental particle and you may have apparent mass increases or changes in its lifetime as a consequence of time dilation.   Look at this factor for the electron you measured at 100 V in the glass globe. Pick the best answer.     The effect is less than 0.1 %.     The effect is around 1%.     The effect is around 10%.     The effect is a factor of 2 change in mass

A particle's dynamics are considered "relativistic" when its velocity is a significant fraction of the speed of light.  For example, the mass of a moving particle seen by a stationary observer increases in proportion to the square root of 1/(1 - (v/c)2).  For typical speeds in the everyday world it is not noticeable, but take a fast moving fundamental particle and you may have apparent mass increases or changes in its lifetime as a consequence of time dilation.   Look at this factor for the electron you measured at 100 V in the glass globe. Pick the best answer.     The effect is less than 0.1 %.     The effect is around 1%.     The effect is around 10%.     The effect is a factor of 2 change in mass

Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter39: Relativity
Section: Chapter Questions
Problem 77PQ
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A particle's dynamics are considered "relativistic" when its velocity is a significant fraction of the speed of light.  For example, the mass of a moving particle seen by a stationary observer increases in proportion to the square root of 1/(1 - (v/c)2).  For typical speeds in the everyday world it is not noticeable, but take a fast moving fundamental particle and you may have apparent mass increases or changes in its lifetime as a consequence of time dilation.  

Look at this factor for the electron you measured at 100 V in the glass globe. Pick the best answer.

   

The effect is less than 0.1 %.
   

The effect is around 1%.
   

The effect is around 10%.
   

The effect is a factor of 2 change in mass. 
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