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<div class="moz-text-html" lang="x-unicode"> <big><font
size="2"><big>Here are three interesting questions you
should be able to answer<br>
at this point based on things which have been
discussed in<br>
chapters 11 and 13.<br>
<br>
1)<br>
<br>
Last night I removed a bottle of pop (Coke, Pepsi,
etc.) from my<br>
freezer. The liquid showed no signs of ice
formation. I swirled<br>
the bottle a little to equilibrate the temperature.
As soon as<br>
I opened the bottle the pop turned to slush (i.e. ice
formed).<br>
<br>
Why? Give a good reasonable explanation. There is
one from<br>
chapter 11 and one from chapter 13. </big></font></big><big><font
size="2"><big><big><font size="2"><big>It is not a
supercooled<br>
liquid.<br>
</big></font></big> <br>
If you want to try this for yourself, here's what to
do.<br>
Take a BOTTLE of pop (you need to be able to see
inside).<br>
Put it in the freezer. Check on it periodically. Let
it<br>
freeze a little. Take it out and let it warm up until
the<br>
last piece of solid melts (swirl gently). As soon as
this<br>
occurs open it and see what happens.<br>
<br>
2)<br>
<br>
What's one reason to use tap water rather than
distilled<br>
water in a steam iron?<br>
<br>
3)<br>
<br>
When it gets really cold out and there's a bad
snowstorm<br>
they use CaCl2 instead of NaCl on the roads. Why?<br>
<br>
<br>
Have fun. Like you have NOTHING else to do with your<br>
time. I'll discuss #1 in our Zoom lecture on Tue and
send an
<br>
e-mail about #2 and #3. We kind of already discussed
#3<br>
in last Tuesday's Zoom lecture.<br>
<br>
Dr. Zellmer</big></font></big> </div>
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