1. Some wooden rulers do not start with 0 at the edge, but have it set on a few millimeters because the cut of the woof alters the length of the first measures. Moreover, some objects are difficult to be aligned on the ruler, thus, in order to remove this difficulty, some wooden rulers do not start with 0 at the edge.
2. The micrometer has been badly bent which means that it will not measure properly and will not be perfectly parallel with the surface to be measured. This distortion will change its precision. The device should be parallel with the surface to be measured in order to maintain its accuracy.
3. No, the parallax will not affect the precision of a measurement that we take as precision is the closeness of the readings and the readings are already precise, thus taking the reading with the same parallax won't impair the precision but decreases the accuracy.
4. Length of box=18.1 cm, width= 19.2 cm and height=20.3 cm, then the a.volume=length×width×height
=[tex]18.1{\times}19.2{\times}20.3[/tex]
=[tex]7050cm^{3}[/tex]
b. The reading of the length is precise to 0.1 centimeters, while the volume's reading is precise to 10 cm³.
c. The stack of 12 of the boxes has height=[tex]12{\times}19.3[/tex]
=[tex]232cm[/tex]
d.The measure of one box is precise to 0.1 cm, while the measurement of the combined boxes is precise to 1 cm.
