Question

Can i do both question 9 and 10 with a short answer?

Answer 1

Answer:

3n seconds

Option D is correct

Step-by-step explanation:

Note that:

Period = 1/Frequency

The frequency changes from 3.0Hz to 1.0Hz

The initial frequency, F₁ = 3.0 Hz

The initial period, T₁ = 1/F₁

T₁ = 1/3 seconds

Since the intial frequency is n seconds

n = 1/3 seconds

The final frequency, F₂ = 1.0 Hz

The final period, T₂ = 1/F₂

T₂ = 1/1

T₂ = 1 second

Therefore:

`\begin{gathered} (T_2)/(n)=(1)/((1)/(3)) \\ (T_2)/(n)=3 \\ T_2=3n \end{gathered}`

The period of the device will change from n seconds to 3n seconds