#$&*
Phy 202
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 the bottle is squeezed, water travels up the vertical tube; the harder the squeeze, the higher up the tube the water travels.
At the same time, when the bottle is squeezed the water in the pressure tube moves slightly away from the bottle, with the distance contingent on pressure applied.
** Length of the air column in units of your measuring device: **
I chose the single-reduced ruler, because it is at a level that is readible, yet more accurate than a non-reduced ruler.
** 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. **
22.8
My single-reduced ruler starts at 1.0. The meniscus of the air column is at 23.8. I found the length of the air column by subtracting the two.
** 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. **
15 cm
22.8
23.8, 25.3
23.8, 27.1
23.8, 26.9
23.8, 26.2
23.8, 26.6
The information above is indicating the change in the pressure tube, when the water in the vertical column is raised to 15 cm.
** 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. **
20 cm
22.8
23.8, 27.4
23.8, 28.3
23.8, 26.9
23.8, 27.2
23.8, 26.7
The information above indicates the change in the pressure tube, when the water in the vertical column is raised to 20 cm.
** 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. **
25 cm
24.7
24.7, 27.7
24.7, 27.2
24.7, 26.8
24.7, 27.3
24.7, 28.2
The information above indicates the change in the pressure tube, when the water in the vertical column is raised to 25 cm.
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** **
About 2 hours
Good data.