# The Elites by hedongchenchen

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```									The Elites            Credit goes to:

Megan Gritzfeld
Mr. Box
Mr. Briber (mentor)
Alex Brush               Mr. Kliewer
Mr. McDougal
Brandon Stiles        Mrs. McDougal
Mrs. Silver
Erick Box               Nick Holland
Reihia Todd              Tye Barba
And nameless angels
Theodore McDougal
Purpose
Purpose: To test our PowerAde bottle
device to contain air pressure and be able
to confirm a pressure drop with increase of
altitude.

Hypothesis
Our team’s hypothesis is that the air
pressure within the bottle will equalize to
the outside air pressure as the altitude
increases.
Procedure
First we went through our checklist in which
we made sure that every component was in
for use. We then sent up our balloon on a kite
reel. After waiting for ten minutes we brought
the balloon down to make a measurement on
the air pressure. We had failed to open the
valve before launching, causing us to re-
launch. Again we had another error which
caused us to re-launch.
Problems                   Problems Fixed
did not have enough        more balloons and
lift to carry our          one large helium
experiment.                filled balloon to give
• SOMEONE didn’t             it enough lift.
open the one-way         • We opened the one-
valve.
way valve.
• SOMEONE let the air
pressure in the bottle   • We solved the last
equalize at ground         problem by collecting
level when they were       data from other
not concentrating on       people to complete
their job.                 our experiment.
Pressure Temperature Test
Ideal Gas Law- P*V=n*R*T
Pressure * Volume=Constant*Temperature
To prove that our air pressure bottle worked we
performed a test using the Ideal Gas Law.
P(initial)=The Bottle’s Pressure was103kpa at
temperature of approx. 373K (bottle in boiling
water).
P(final)=87.5kpa at a temperature of approx. 290K
(room temperature).
Calculated pressure change -20kpa over this temp.
drop. Actual difference was -15.5kpa.
This agrees within 22.5% of our calculation.
Test of Bottle Result
Seconds    Pressure (kpa)

50    102.475832
60    102.494864
70     102.39011
80     102.27584
90    102.180602
100    102.123428
110   87.56152962
120   87.58057722
130   87.58057722
140   87.55200582
150   87.54248202
160   87.55200582

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