SOLUTION TO THIS QUESTION: A simple pendulum with a period of 2secs has its length doubled. Its new period is? (a) 1sec (b) 1.41sec (c) 0.35sec (d) 2.83secs (e) 4secs. | School Of Science, Global

I THINK I found a new way of finding the harmonic mean??? I couldn't find any source explaining it like this, but even if it isn't new, I think it's a good way of explaining what the harmonic mean wants. | Learning Math with Howie Hua