5 ms·

I think a good rule of thumb is 'check what accuracy you need your answer to, and then include all effects relevant to that precision'. If you needed an answer

by joe__f 4y ago

I think a good rule of thumb is 'check what accuracy you need your answer to, and then include all effects relevant to that precision'. If you needed an answer accurate to four significant figures, then you'd include relativistic effects for v < 0.1 c

bawolff 4y ago
I don't think that fits the definition of rule of thumb.
- asah 4y ago
  As a rule of thumb, I like to define my definitions first. /s