A 100 kg cotton bag and a 100 kg iron bar both have the same mass when measured on a weighing machine, indicating they weigh the same. The discussion raises the question of whether one is heavier than the other, suggesting that external factors, such as atmospheric conditions, could influence the measurement. However, using a NIST traceable weighing machine with standard corrections would show that neither is heavier. The focus is on the principles of mass versus weight and how accurate measurements account for environmental factors. Ultimately, both objects weigh the same under controlled conditions.
