Your 'measuring atmospheric pressure' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
your comment
How does the system behave and how does it 'feel'?
when you push, the air column get samller and smaller
Length of the air column in units of your measuring device:
I have chosen the second ruler, because it is half the size of the regular one, and while precision is needed, I also do not want to exceed the easy measuring length of the ruler
I don't think the length ratio is exactly 2 to 1. Your results from the Optical Distortion lab would allow you to refine the results you obtain here.
Your report of the vertical position of the first mark relative to the water surface of the first mark, the length of the air column in units of your selected measuring device, and the two meniscus positions observed with each of your five trials.
15 cm
i actually got a reading of 30 cm, but as it is half size, I halved that, and got 15 cm
Your report of the vertical position of the second mark relative to the water surface of the first mark, the length of the air column in units of your selected measuring device, and the two meniscus positions observed with each of your five trials.
13 cm
15 cm
15cm from end, 13 cm
14 cm, 15 cm
13 cm, 16.5 cm
11 cm, 19 cm
the meaning of this is that I am compressing the air in the tube, this moving the water (actually the water is acting as an intermediary for the force on the bottle0 closer to the end of the tube.
Your report of the vertical position of the highest mark relative to the water surface of the first mark, the length of the air column in units of your selected measuring device, and the two meniscus positions observed with each of your five trials.
11, 20
11,21
10, 23
10, 22
9, 25
the water has moved further, creating a higher pressure in the bottle.
Your report of the vertical position of the 'in-between' mark relative to the water surface of the first mark, the length of the air column in units of your selected measuring device, and the two meniscus positions observed with each of your five trials.
mark 4,
8, 35
8, 34
8, 36
8, 36
yet mroe pressure
third mark
10, 20
10, 27
10, 18
10, 27
okay
Overall good. See my notes.