Occupation: : 369Date of Birth : 1994-09-29Join Date : 2010-11-12Age : 29
Subject: Frequency Wed 17 Nov 2010, 6:40 am
Frequency
Frequency is a measure of recurring events for the time .. Also known as rate of change the shape of the face-oriented Unit is a unit frequency Hz hertz - Hz rate of the German Heinrich Rudolf Hertz, born in 1857