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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 water level in the vertical tube rises when the bottle is squeezed and the air column in the pressure tube becomes shorter as the water moves toward the end of the pressure tube.
** Length of the air column in units of your measuring device: **
I will be using a tape measure showing cm in addition to inches. This means there is no reduction being used.
** 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. **
25.5cm
measured from the end of the cap inside the tube to the meniscus of the water at the end of the air colum. Readings were 0cm and 25.5cm.
** 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. **
21cm
25.5cm
25.5cm,24.9cm
25.5cm,24.8cm
25.5cm,25.2cm
25.5cm,25.0cm
25.5cm,24.8cm
As the water moves up the vertical tube to a point approx. 21cm above the top of the water in the bottle, it only shortens the air column in the pressure tube by approx. 0.56cm.
** 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. **
31cm
25.5cm
25.5cm,24.7cm
25.5cm,24.7cm
25.5cm,24.8cm
25.5cm,24.7cm
25.5cm,24.8cm
As the water moves up the vertical tube to a point approx. 31cm above the top of the water in the bottle, it only shortens the air column in the pressure tube by approx. 0.76cm.
** 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. **
41cm
25.5cm
25.5cm,24.3cm
25.5cm,24.3cm
25.5cm,24.4cm
25.5cm,24.3cm
25.5cm,24.4cm
As the water moves up the vertical tube to a point approx. 41cm above the top of the water in the bottle, it only shortens the air column in the pressure tube by approx. 1.16cm.
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1.5 hours
&#Very good responses. Let me know if you have questions. &#