Take a break from the
drudgery with some of these jokes, song parodies, anecdotes and assorted humor that has been collected from friends & from websites across
the Internet. This humor is light-hearted and sometimes slightly offensive to the easily-offended, so you are forewarned. I have taken care
to censor "humor" with reproductive function innuendo and hateful tirades, so it is all workplace-safe. I have also tried to warn
of any links that will result in audio clips so you can take appropriate precautions. Please send any potential candidates for this humor page
to the e-mail link above.
Humor #1 | Humor #2 | Humor #3
So, how many AA batteries would it
take to power a standard adult human for one day?
A Manganese/Alkaline AA cell it rated at about
2.4 amp-hours. If we assume 1.5 volts average this gives approximately 3.6 watt-hours (slightly optimistic). Since
there are 3,600 seconds in an hour this is equivalent to 12,960 Joules.
A human consumes about 2,000 calories/day. A dietician calorie is equal to 1,000 engineering calories. A calorie
is equal to 4.2 Joules. Therefore this is equivalent to 2,000 * 1,000 * 4.2 = 8.4 * 106
Joules per day.
Dividing one by the other you will need about 648 AA cells to power a human for one day.
This assumes that
the power from the AA cell will go through the same inefficiencies as the chemical processes in a human. (A human
runs at about 20% efficiency chemical energy to mechanical energy). If we can circumvent this inefficiency we
would only need 20% of this number of cells - say 130 cells.
---From: Ben Gebeau
Related Pages on RF Cafe:
or Li-Poly Battery Characteristics
Inside a 9-Volt Battery
- Battery Resources & Design
- Battery App Notes
How Many AA Batteries Would to Take to Power a Human?
- Ray-O-Vac Ad, August 25, 1945, Saturday Evening Post