| [ sciEncE ] in KIDS 글 쓴 이(By): parsec ( 먼 소 류 ) 날 짜 (Date): 2000년 9월 3일 일요일 오전 09시 32분 41초 제 목(Title): Wise answer on electricity Alternating electrical potential is applied to your muscle when you touch the home power somehow exposed. Galvani discovered that the frog muscle contracts by applied electrical potential. Yours is not very different from the frogs. So your muscle should vibrate with twice the frequency of the home power. Electricity shows you are not different from a frog. par·sec /'par-"sek/ n. Etymology: parallax + second Date: 1913 : a unit of measure for interstellar space equal to the distance to an object having a parallax of one second or to 3.26 light-years |