Which way of finding mass is more accurate: using the electronicbalance or the triple beam balance? What mistakes could have been made with each method?

Answer 1

Both have to be calibrated. Which is more precise? depends on the two units.
which is more accurate? If both have been calibrated, they should be same accuracy, however, inexpensive electronic scales (as in many schools) are temperature sensistive, and drift in calibration. On the other hand, many non-enclosed triple beams are subject to wind movement also.

Answer 2

Thank you bobpursley