Equation 1: F = kx Equations 2: T = 1/f Equations 3: T = 2n(L/g)-1/2 Equation 4: T = 2n(m/k)-1/2 Percent Error = (abs( measured-actual)/ actual) * 100 Percent Difference = (abs(Value, - Value ,)/ ((V,+V,)/2)) * 100