==An Oddity?== 
 *L is measured in meters; 
 *g is measured in m/s^2. 
 This creates the expression m^2/s^2. 
 *The square root of m^2/s^2 is m/s. 
 I thought a period is a measurement of time it takes for one cycle (s, not m/s). 
 Can someone help explain this?