#$&*
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'? **
The system behaved very similar to what was described above. When I squeezed the container, the water began to rise just a little in the vertical tube and the water in the pressure tube moved slightly and shortened the air column.
** Length of the air column in units of your measuring device: **
I chose the singly-reduced ruler copy because the marks on the page are closer together, and the singly-reduced copy seems to work well for this experiment.
** 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. **
The length of the air column is about 5 cm.
@& It is unlikely the air column would be this short. This is actually too short to give very good results; but we'll see how it works out.*@
I obtain the length using two singly-reduced ruler copies taped together to the measure 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. **
3.0 cm
5.0 cm
6.25 cm, 7.0 cm
3.25
5.5 cm
6.0 cm, 7.25 cm
The information above represent the measurements of the meniscus, air column and level of water in the tubing.
@& I can't identify which is which.
Can you clarify exactly what each measurement means? If you do this for one set of data, I can read the others.
*@
** 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. **
3.25
5.5 cm
6.5 cm, 7.0 cm
3.0
5.5 cm
6.5 cm, 7.5 cm
3.25
5.5 cm
6.0 cm, 7.25 cm
3.25
5.5 cm
6.0 cm, 7.25 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. **
3.25
5.5 cm
6.0 cm, 7.25 cm
** **
** **
3 hours
@& I don't see where you used significantly different vertical positions for the water in the vertical tube. Can you clarify?*@