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.
When sex is painful. Painful sex is more common in women. The cause may be physical or psychological, and is often a combination of the two. A painful experience of sex may lead to anxiety the next time, poor reÂ­laxation and lubrication, and so sex is painful again, and so on.