User:Praphai Donphaimueang/sandbox
Graduated cylinder is that the main reason as to why the reading of the volume is done via miniscus is due the nature of the liquid in a closed surrounded space. By nature, liquid in the cylinder would be attracted to the wall around it through molecular forces. This forces the liquid to take up either convex or concave shape, depending highly on the type of the liquid in graduated cylinder. By reading the liquid at the bottom part of a concave or the top part of the convex liquid is equivalent to reading the liquid at its miniscus. [1] From the picture, the level of the liquid will be read at the bottom of the meniscus, which is the concave. The most accurate of the reading that could be done here is reduced down to 1 ml due to the given means of measurement on the cylinder. From this, the derived error would be one tenth of the least figure. For instance, if the reading is done and the value calculated is set to be 36.5 mL. The error, give or take 0.1 mL, must be included too. Therefore, the more precise value equates to 36.6 +/- 1; 36.4 or 36.6 mL. Therefore, there are 3 significant figures from the reading. [2]
Uses[edit]
Graduated cylinders are calibrated either “to deliver” or “to contain” the indicated amount of liquid, and marked “TD” or “TC” respectively. Formerly the tolerances for “to deliver” and “to contain” cylinders are distinct; however these are now the same. Also, the international symbols “IN” and “EX” are more likely to be used instead of “TC” and “TD” respectively[3]
References[edit]
- ^ "Volume Measurements with a Graduated Cylinder" (PDF). Retrieved 2016-02-04.
- ^ "Math Skills - Scientific Notation". www.chem.tamu.edu. Retrieved 2016-02-12.
- ^ "Graduated Cylinders". sizes.com. Retrieved 2016-02-23.