$(1$ point each$)$ A small mass $("$bob$")$ hangs on the end of a string. The string is pulled back by a small angle and released from rest. The bob then oscillates $($swings back and forth$)$ without damping as a simple pendulum.

Assume we can change each of the following quantities. Which of these quantities will affect the period of the bob's oscillation? Answer "yes" $($it will affect the period$)$ or $"$no$"($it will not affect the period$)$: