1. The problem statement, all variables and given/known data What length must the pendulum be changed to in order to show the correct time? L=0.5m After 12hours the clock is behind by 30minutes. 2. Relevant equations w=sqrt(g/L) w=2πf 3. The attempt at a solution I thought if I set the frequency equal to 1Hz and solved for length it would work. 2πf=sqrt(g/L) 4π^2=g/L <-got rid of f since its equal to 1 L=g/(4π^2) This unfortunately doesn't give the correct answer, I also tried making a ratio involving the time but that failed miserably.