PHY 202
Your 'bottle thermometer' 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 optional message or comment: **
I am extremely confused about this experiment. I do not think I am doing it right. Which tube is which? I think I am getting them mixed up?
** #$&* What happens when you pull water up into the vertical tube then remove the tube from your mouth? **
The water stays in the vertical tube when you cap the other tube. The pressure in the bottle must keep it up there.
** #$&* What happens when you remove the pressure-release cap? **
It doesn't because its end is in the water.
** #$&* What happened when you blew a little air into the bottle? **
The pressure increased in the bottle and the air column decreased. The column did not move back because the end of the tube is under the water and the pressure remained the same throughout.
** #$&* Your estimate of the pressure difference due to a 1% change in pressure, the corresponding change in water column height, and the required change in air temperature: **
I do not know how to get the N/m2
** #$&* Your estimate of degrees of temperature change, amount of pressure change and change in vertical position of water column for 1% temperature change: **
** #$&* The temperature change corresponding to a 1 cm difference in water column height, and to a 1 mm change: **
** #$&* water column position (cm) vs. thermometer temperature (Celsius) **
** #$&* Trend of temperatures; estimates of maximum deviation of temperature based on both air column and alcohol thermometer. **
** #$&* Water column heights after pouring warm water over the bottle: **
** #$&* Response of the system to indirect thermal energy from your hands: **
** position of meniscus in horizontal tube vs. alcohol thermometer temperature at 30-second intervals **
** #$&* What happened to the position of the meniscus in the horizontal tube when you held your warm hands near the container? **
** #$&* Pressure change due to movement of water in horizonal tube, volume change due to 10 cm change in water position, percent change in air volume, change in temperature, difference if air started at 600 K: **
** #$&* Why weren't we concerned with changes in gas volume with the vertical tube? **
** #$&* Pressure change to raise water 6 cm, necessary temperature change in vicinity of 300 K, temperature change required to increase 3 L volume by .7 cm^3: **
** #$&* The effect of a 1 degree temperature increase on the water column in a vertical tube, in a horizontal tube, and the slope required to halve the preceding result: **
** #$&* Optional additional comments and/or questions: **
I'm sorry for the confusion.
This experiment was assigned out of sequence. It refers you to the Measuring Atmospheric Pressure experiment, which wasn't assigned until Assignment 11.
I've changed the order of the experiments so that the Measuring Atmospheric Pressure Part 1 is now in Assignment 9 and the Bottle Thermometer experiment in Assignment 10.