If I use a measuring cylinder to measure 55cm3 of water, what is the degree of accuracy of my measuring cylinder?
Most measuring cylinders for 100 cm^3 max volume can be read a lot more accurately that +/- 1 cm^3. For example, see
http://www.jaytecglass.co.uk/GradeAspoutcylinders.php
The degree of accuracy of a measuring cylinder depends on its markings or divisions. To determine the degree of accuracy, you need to look at the smallest division or increment on the measuring cylinder.
For example, if the measuring cylinder has markings every 1 cm3, then the degree of accuracy would be 1 cm3. This means that you can measure the volume of water with an accuracy of plus or minus 1 cm3.
If the measuring cylinder has markings every 0.5 cm3, then the degree of accuracy would be 0.5 cm3. In this case, you can measure the volume of water with an accuracy of plus or minus 0.5 cm3.
It's important to note that the degree of accuracy is determined by the measuring device itself, and it may differ for different measuring cylinders. Therefore, it's always a good idea to check and note the markings or divisions on the measuring cylinder to know the degree of accuracy for your specific instrument.