Answer:
[tex]T=0.02s[/tex]
Explanation:
The frequency is the number of oscillations per unit of time of any periodic event and the period is the duration of each oscillation. Therefore, the period is defined as the inverse value of the frequency:
[tex]T=\frac{1}{f}[/tex]
Replacing the frequency of the marble:
[tex]T=\frac{1}{45Hz}\\T=0.02s[/tex]
