measuring atmospheric pressure

7/5 around 4:30 pm

** How does the system behave and how does it 'feel'? **

When squeezing on the bottle and moving water up the vertical tube, water in the pressure tube decreases air space at end; pressure in bottle is also increased and I can feel greater resistance when applying force.

** Length of the air column in units of your measuring device: **

I've chosen the reduction of one less copied version, downsized.

** 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. **

I recorded that I have 30 cm on the bottom end in the bottle, and 31.5 cm at the end of the pressure tube; thus, total air column equals 61.5 cm.

** 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. **

32

61.5

61.0, 32

62.5, 32

62.5, 32

61.5 32

61.75, 32

These are the five trials of water movement to my first marked interval; the air column increased on the end towards the water line, but decreased in length on the capped end, given more pressure on the bottle.

** 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. **

42

61.5

62.25, 42

62.35, 42

62.25, 42

62.50, 42

63.00, 42

These are the five trials of water movement to my second marked interval; the air column continued to increase the length towards the water line, while decreasing the length towards the capped end, given added force to move water vertically at the second interval.

** 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. **

52

61.5

62.50, 52

62.75, 52

62.95, 52

62.50, 52

62.50, 52

These are the recorded trials for the third interval; although they increased starting out, there wasn't a large difference when compared to the second interval of change in the air gaps.

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2.5 hours

#$&*

*#&!*#&!*#&!

@& It appears that you have good data to use in the second part of this experiment.*@