Experiment of December 5, 2019:

Question:

What does Ms. Santa observe when the ruler protrudes a shorter or a longer bit over the edge of the table?

A) The long ruler makes a high tone, the short ruler makes a low tone.

B) The long ruler makes a low tone, the short ruler makes a low tone.

C) The long ruler makes a low tone, the short ruler makes a high tone.

D) The long ruler makes a high tone, the short ruler makes a high tone.