A digit zero in a measurement__________________?
Correct answer: A. May be significant may not significant
- A. May be significant may not significant
- B. Always significant
- C. Always insignificant sign
- D. Significant only if left to a significant figure
Explanation
A zero may be significant or insignificant depending on its position: zeros between nonzero digits are significant, while leading zeros are not. Students may choose b because they assume every displayed digit represents measured information.
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Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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