The first challenge in the book is to lick a 9V battery. Why is it a challenge, you ask?- Try it!
I’ve read some other people’s accounts of this experiment in which they say they barely felt anything, but oh did I feel it!
After drying my tongue it was less uncomfortable, but still perfectly detectable.
* Measuring Your Tongue
My multimeter’s readings were both higher than what the book suggested they would be.
I did get the experiment’s conclusion that the lower resistance of my moist tongue allowed more current to flow through it and that’s why the sensation was weaker when my tongue was dry.
| Tongue |
¾ in (1.905 cm) |
| Moist |
609KΩ |
| Dry |
740KΩ |
* Further Investigation
| My arm |
¼ in (0.635 cm) |
1 in (2.54 cm) |
| Dry skin |
No reading/ L |
No reading/L |
| Moist skin |
.97Ω |
1.06Ω |
Mark your arm so you know where to place the probes.
The added salt dramatically diminished the resistance!
|
Glass of water (1cup) |
2/3 in (1.69 cm) |
|
Without added salt |
1.190MΩ |
|
With added salt (3 gr.) |
11.5KΩ |