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'? **
The water in the vertical tube went up, and the water in pressure indicating tube also went up, but by very little and not as much as the water went up in the vertical tube. The water went up in both tubes at the same time as I squeezed the bottle. The bottle felt easy to squeeze, but you could still feel the pressure inside of the bottle.
** Length of the air column in units of your measuring device: **
I have chosen the normally sized ruler (that was not reduced). I have chosen this because it was the easiest to read and I believe that it is 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. **
27.5 cm
I obtained the result by using the measuring device, the copy of the normal sized ruler in centimeters, with the readings starting at 0 cm at the end and ending with 28 centimeters at the other end. I indicated this length by measuring the length of the air column starting at 0 cm and then seeing where the air column ended, and recorded the time to indicate the length.
** 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. **
10 cm
27.5 cm
9.9 cm, 10 cm
9.9 cm, 10 cm
10 cm, 10.1 cm
9.9 cm, 10 cm
9.9 cm 10.1 cm
For the above measurements, the first number in each line is the position of the meniscus before the squeeze then the position of the meniscus when the water in the vertical tube was at the first mark. All of the measurements are very close, and some of them are the same. These measurements were found by using the measuring device and then watching how much the meniscus changed when the bottle was squeezed. The numbers did not change very much because the bottle was not squeezed enough to change the measurements that much.
** 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. **
10 cm
27.5 cm
9.7 cm, 10.2 cm
9.6 cm, 10.3 cm
9.7 cm, 10.3 cm
9.7 cm, 10.2 cm
9.6 cm 10.3 cm
For the above measurements, the first number in each line is the position of the meniscus before the squeeze then the position of the meniscus when the water in the vertical tube was at the first mark. All of the measurements are very close, and some of them are the same. These measurements were found by using the measuring device and then watching how much the meniscus changed when the bottle was squeezed. The numbers did change more than before, but was still about the same. The numbers changed more than before because the bottle was squeezed a little harder, so there was more pressure.
** 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. **
10 cm
27.5 cm
9.8 cm, 11.1 cm
9.7 cm, 11 cm
9.8 cm, 11.1 cm
9.8 cm, 11 cm
9.9 cm, 11.1 cm
The highest mark that was managed was to the third mark and the numbers above reflect how much the meniscus moved starting when the bottle was squeezed to the third mark. There was the biggest difference between these measurements, because the bottle was squeezed harder than the other times, which means there was more pressure moving the water.
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about 1 hour
&#This looks good. Let me know if you have any questions. &#