Hertz is the number of cycles per second in an oscillating wave form. So 60Hz has 60 identical cycles in 1 sec. An Ampere (amp, or A) is the amount of electrons (or charge) that flow past a certain point in one seconds. So amperes are Coulombs/second.
The most and the least painful places to get a tattoo. Shoulder. The shoulder is the least painful tattooing site for two main reasons. First, because in this area there is a greater amount of muscle and second â nerves are not so much sensitive as in other nooks of the body. This area is often the most used and first timers tend to opt for them.
Once you've crossed that line, the leap to other piercings is much less daunting, and after a few piercings, the pain of a tattoo doesn't seem half as bad. However, just like no two people will experience getting a tattoo in the same way, nor will they experience getting a cartilage piercing the same way.