Answer: 0.04 s
Explanation:
The given equation for the period [tex]T[/tex] of a pendulum when the acceleration due gravity is given in feet per squared second [tex]g=32 ft/s^{2} [/tex] is:
[tex]T=2 \pi \sqrt{\frac{l}{32 ft/s^{2}}}[/tex]
Where [tex]l=\frac{1}{18} ft[/tex] is the length of the pendulum
[tex]T=2 \pi \sqrt{\frac{\frac{1}{18} ft}{32 ft/s^{2}}}[/tex]
[tex]T=0.04 s[/tex]