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Re: [Phys-L] [MARKETING] Re:[njaapt] [SPAM] Re: popcorn physics



Arlyn:

This sounds interesting! Would like a copy of this activity if you don't
mind sharing it.

Anthony


Phys-L@Phys-L.org writes:
I do a similar activity with a hot air popper. Count the kernels, measure
the time (1200 watt popper), calculate the energy per kernel and per
batch, calculate the cost for electricity (about $0.02 per batch if you
start the popper cold), calculate how many bench presses of 200 lbs
lifting 0.5 m per bench press it would take at 100% efficiency to pop one
batch, calculate how fast a baseball would be moving with the same energy
for one kernel. Interesting results and a good example of how little our
electrical energy costs.
________________________________________
From: Phys-l [phys-l-bounces@phys-l.org] On Behalf Of Anthony Lapinski
[Anthony_Lapinski@pds.org]
Sent: Wednesday, June 19, 2013 10:48 AM
To: njaapt@mail.aapt.org
Cc: njaapt@mail.aapt.org; Phys-L@Phys-L.org; tap-l@lists.ncsu.edu
Subject: Re: [Phys-L] [MARKETING] Re:[njaapt] [SPAM] Re: popcorn physics

Cool! Might be easier to just heat water in a microwave. Then, mcT = Pt
since "all" the energy is used to heat the water. cCan also do with a
small immersion heater to determine power, efficiency, etc. Of course, not
as exciting as eating popcorn!

"NJAAPT" <njaapt@mail.aapt.org> writes:
Hey Anthony,
An energy activity that I've been dying to try with popcorn is to
get a microwave in class, determine the power output (based on microwave
wattage & power level), then time how long it takes to pop the bag.
Students can determine how much energy was used to pop the popcorn, then
calculate the cost based on local energy rates. Best of all, the students
get to eat the activity afterwards. I figured I would share the idea.

Sincerely,
Justin Son
Teacher of Physics- Marlboro High School
json@frhsd.com
732-617-8393 x6140


-----Original Message-----
From: Anthony Lapinski [mailto:Anthony_Lapinski@pds.org]
Sent: Tuesday, June 18, 2013 11:03 PM
To: NJAAPT
Cc: Phys-L@Phys-L.org; njaapt@mail.aapt.org; tap-l@lists.ncsu.edu
Subject: [MARKETING] Re:[njaapt] [SPAM] Re: [Phys-L] popcorn physics

Yes, water (moisture) content. But how much air is inside each kernel? If
ideal kernels have 14% moisture, then that's 86% air (which has very
little mass). How are these small amounts determined to get the best
kernels?


Phys-L@Phys-L.org writes:

On 2013, Jun 18, , at 19:09, Anthony Lapinski
<Anthony_Lapinski@pds.org>
wrote:


Finally, does anyone do a popcorn lab when teaching about heat? I'm
interested is doing something different with my students next year.
Maybe
mass the seeds, pop them, then re-mass to find the air content?


You mean water content?

bc pops corn as a Poisson distribution.
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