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 I squeeze the bottle with the tubes connected, when force is added to the bottle, the water in the tube moves away from the system. The more force that is added to the bottle, the more the water moves away from the system. This system, as compared to the first system, takes more force to fill/move the water. Also, it takes more force to move the water further.
Length of the air column in units of your measuring device:
I choose to use the normal ruler because I didn’t want to do math to convert it back to normal and I feel that it is pretty accurate.
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.
46.3 cm
29.7 cm
I got these reading by marking where the water level is and then measuring it to the end of the stopper.
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.
25.5 cm
29.5 cm
29.5, 30.4
29.6, 30.3
29.7, 30.3
29.5, 30.5
29.5, 30.4
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.
35.5 cm
31.1 cm
31.1, 33.0
31.0, 32.9
31.1, 32.5
31.1, 32.7
31.0, 32.7
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.
45.5 cm
29.2 cm
29.2, 31.3
29.2, 31.4
29.0, 31.4
29.2, 31.4
29.2, 31.3
Good work. Let me know if you have questions.