BoomWhistleClang Mystery Cache
Please note Use of geocaching.com services is subject to the terms and conditions
in our disclaimer.
You are looking for a black Eclipse tin.
There are many caches involving ballistics where the air resistance
is conveniently ignored. However, in the real world life is not so
simple and this cache will give you the chance to see the effect of
drag on a high speed eclipse tin.
Here's what you have:
Ten standard unopened tins of Eclipse mints, joined together by
their lids and bottom to form a long shaft of minty goodness.
The empty weight of the tins can be taken as 23.2 gm but to that
you will need to add the weight of the mints.
The coefficient of drag? Who knows, however when dropped this
assembly reaches a velocity of 100 m/s after 20 seconds.
You can assume this shaft is stable in flight and presents the
smallest area against the direction of travel and generates no
lift.
Conditions:
Down at sea level it is a warm 35C with standard atmospheric
pressure.
Gravity can be taken as 9.807 m/s^2
Here's what you do:
Shoot the assembly from an air cannon with an elevation of 502.6
mils.
Have the canon pointing at a bearing of 69.11 degrees true.
Due to limits in the strength of eclipse tins the exit velocity
from the canon is limited to 240 m/s.
Additional Hints
(Decrypt)
Svefgyl jbexrq bhg gur ngzbfcurevp pbaqvgvbaf ng gur ynhapu nygvghqr.
Frpbaqyl jbex bhg n inyhr sbe Pq tvira vg'f grezvany irybpvgl.
Guveqyl, frr jurer vg ynaqf.
Treasures
You'll collect a digital Treasure from one of these collections when you find and log this geocache:
Loading Treasures