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** Measuring Atmospheric Pressure_labelMessages **
2/10 9pm
** Measuring Atmospheric Pressure_labelMessages **
When I squueze the bottle water rises in the vertical tube and the air colum in the horizontal tube shrinks. The pressure of the air in the bottle is pushing the water slug to the end of the horizontal tube.
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I’m going to use a 1:1 ratio. I’m going to try my ruler.
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The length of my air column is 21cm.
I used my ruler and measured from 0cm to 21cm for the air column. I then taped my ruler to the meniscus with the edge of the water slug at the 10 mark.
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20cm
21cm
10.0cm, 10.5cm
10.0cm, 10.5cm
10.2cm, 10.6cm
10.2cm, 10.6cm
10.2cm, 10.6cm
First line we have the distance of the water rise in the tube. Second line is the length of the air column. Lines 3 thru 7 are the 5 individual trials with the air column start and end point when the bottle is squeezed.
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30cm
21cm
10.3cm, 10.8cm
10.2cm, 10.8cm
10.2cm, 10.8cm
10.2cm, 10.8cm
10.2cm, 10.8cm
I squeezed the water to the 30cm mark on the tube. My uncompressed air column is 21cm. The remaining lines are the before and after squeeze point of the air column.
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80cm
21cm
10.2cm, 11.6cm
10.2cm, 11.6cm
10.2cm, 11.6cm
10.2cm, 11.6cm
10.2cm, 11.6cm
The above data shows that the beginning air column is 21cm. I squeezed the bottle to 80cm above the water. The remaining lines are the before and after squeeze positions of the air column.
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50cm
21cm
10.2cm, 11.1cm
10.2cm, 11.0cm
10.2cm, 11.1cm
10.2cm, 11.0cm
10.2cm, 11.1cm
The above data shows that the beginning air column is 21cm. I squeezed the bottle to 50cm above the water. The remaining lines are the before and and after squeeze positions of the air column.
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2 hours
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You have good data, which you will use in the subsequent experiment.
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