CIA

1
CIA

• Barometric Pressure
• Chris Potter
• Ivan Aguilera
• Aaron Buckley

2
Experimental Protocol

• Make sure all material are present.
• . Lab Pro
• . Gondola
• . Balloon
• . Barometer
• . Helium
• . 1000ft of cord
• . Computer
• . Orange flags
• . Batteries
• . Metal rings
• Attach the balloon securely to the cord and add
  metal ring/ pin the reel to the ground.
• Secure all sensors to the gondola.
• Double check attachments.
• Hook the gondola to the ring.
• Press the start button once.
• Check for the sound and the green lights flash on
  the lab pro to know that it is working properly.
• Release the balloon.
• Attach flags every 100ft.

3
Purpose

• The purpose of our experiment is to find the
  relationship between pressure and height. Then we
  will compare the validity of the two different
  model of finding pressure the Meteorological
  Model and the Adiabatic Model.

4
Method

• We will send a helium filled balloon carrying a
  gondola with the labpro and the barometric
  pressure sensor. Then we will make sure that we
  set up the labpro right and that it will collect
  our data. We will send the balloon up until 1000
  ft. of line is let out, stopping every 100 ft. As
  the balloon rises our pressure should go down
  because the higher you go the less weight that
  the air has, so the pressure should be lower.
  After we have our data we will use the two models
  to try to calculate the barometric pressure at
  1000 ft. Which one gives the closest to our
  determined value is the one that is the most
  appropriate to use at the altitude of around 1000
  ft.

5
Data

• Pressure V. Time Pressure V. Height

6
Analysis

• Hypothesis 1- Pressure and altitude are
  inversely related.
• Since the graph of pressure versus height is
  inverse, then their relationship is inverse.
• Hypothesis 2- The Meteorological atmospheric
  model is better than the Adiabatic for the
  height of about 1000ft.
• After this experiment we found that our
  hypothesis was correct. The meteorological model
  came 0.12 kPa closer to the actual pressure.