Final answer:
Additional uncertainty in measurements arises due to factors like limited measuring instrument precision, user skill level, object irregularities, and data extraction from graphs. Careful consideration and minimization of these factors are necessary for reliable measurements.
Step-by-step explanation:
Additional uncertainty arises in measurements when there are factors that contribute to the lack of precision or accuracy of the measurement. Factors that add to measurement uncertainty can include limitations of the measuring instrument, such as the smallest division on a ruler being 0.1 inches, the skill of the person making the measurement, such as someone with impaired vision, or irregularities in the object being measured. Additionally, there might be uncertainty in calculations derived from measured quantities, such as calculating the area of a floor based on uncertain length and width measurements. When measurements are represented graphically, numbers extracted from graphs are also subject to data extraction uncertainties. It is essential to carefully consider and attempt to minimize these uncertainties in order to improve the reliability of the measurements.