Two trumpet players are trying to play 698.5 Hz, but one of them is sharp (her frequency is too high), so that they create a 11.6 Hz beat frequency. What is the frequency of the sharp player's note?

Learned about life itself

The correct choice is c

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips.