Phy202
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 squeaze the 2-litre the vertical column does flow out at a faster rate and the air column in the pressure tube become shorter toward the end where the tube is sealed off.
** Length of the air column in units of your measuring device: **
I used the first copy of the measuring devices because my air column was too long to reduce it to the 2nd order of reduction.
** 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. **
55cm
I taped multiple copies of the first measuring device papers and measured the air column tube accordingly.
** 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
55
42,43
42,43.1
42,43
42,43.1
42,43.2
This means that the liquid in the meniscus in the air column moved about 1 cm on average when the water in the vertical tube was raised 10 cm above the water level by squeazing the 2-litre.
** 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
55
42,43.7
42,43.8
42,43.7
42,43.8
42,43.8
This means that as the water rose to 20 cm above the water level in the vertical column the liquid in the air column moved about 1.7 to about 1.8 cm after the pressure was applied on the 2-litre to reach the 20 cm mark.
** 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. **
65
55
42,45.8
42,45.9
42,46.0
42,46.0
42,45.9
When the water was pressurized to the 65cm mark the air column moved about 4cm total in the pressurized tube.
** **
40
55
42,44.8
42,44.6
42,44.8
42,44.6
42,44.6
When the water level rose to 40 cm in the vertical tube then the average pressure was about 2.6cm of a raise in the pressurized air column tube.
** **
45 min.
You appear to have good data, which you will use in Part 2.