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'? **
As I squeeze the bottle, the water in the pressure tube travels further away from the bottle, hence shortening the air column. As I continue to squeeze, the water in the vertical tube rises.
** Length of the air column in units of your measuring device: **
I have lost my rulers, so I am using a convential hand held ruler that is marked in centimeters and milimeters.
** 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. **
24.7 cm
I aligned the 10 cm mark on the meniscus of the water at the left hand side of the air column. I then measured to the end using my same ruler and subtracted 10 from that value.
** 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. **
26.8cm
24.7cm
10cm,16.4cm
The water in the vertical tube was 26.8 cm above the waters surface. As I squeezed, raising the pressure so that the water level in the vertical tube was 10cm, the air column shortened by 6.4cm.
** 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. **
36.8cm
24.7cm
10cm,19.0cm
The water in the vertical tube was 26.8 cm above the waters surface. As I squeezed, raising the pressure so that the water level in the vertical tube was 20cm, the air column shortened by 9.0cm.
** 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. **
40.2
24.7
10cm, 21.5cm
The water in the vertical tube was 26.8 cm above the waters surface. As I squeezed, raising the pressure so that the water level in the vertical tube was 23.4cm, the air column shortened by 11.5cm
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35min
&#This looks good. Let me know if you have any questions. &#