i just had this question and i totally guessed. it was 2.2.
Answer: 0.04 s
Explanation:
The given equation for the period
of a pendulum when the acceleration due gravity is given in feet per squared second
is:

Where
is the length of the pendulum


Changing the medium of the wave.
Waves is always determined by the properties of the medium, which means that changing the medium will change the velocity of the wave