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.
Image: Shutterstock. Your spine is made up of 26 bones, starting from the neck till the base of your buttocks, and each tattoo you are going to get along them is going to hurt you more. I must say, the spine is the most painful place to get a tattoo on. Quick Tip: To escape from the extreme pain, you can get the tattoo inked either on the left or the right side of your back. Otherwise, you might find yourself squinting and squirming with pain.