Answer:
a. 20 seconds
b. 160 seconds
Explanation:
a. Frequency is given by [tex]f=\frac{1}{T}[/tex], where [tex]T[/tex] is the period in seconds. Rearranging, we get [tex]T=\frac{1}{f}[/tex]. Given that frequency is 0.05 Hz, we have:
[tex]T=\frac{1}{0.05}=\boxed{20\text{ seconds}}[/tex]
b. Since we just found that it takes 20 seconds to complete one rotation (period), it will take [tex]20\cdot 8=\boxed{160\text{ seconds}}[/tex] to complete 8 rotations.
