Remember that the line closest to the needle is zero, so that if the top ring of the plunger rests two small lines below this line there are 0.02 mL of liquid in the syringe.
Pressure is Confined Kinetic Energy. According the kinetic theory of ideal gases , air pressure can be defined as the average momentum transfer per unit area per unit time due to molecular collisions between a confined gas and its boundary.
The most accurate ranking by experts was 100% for face numbers 3, 4, 7, 8, 9, 10, and 11. The face numbers 1, 2, 5, and 6 with 90% agreement had the least accuracy in ranking.