Question

Pure sounds produce single sine waves on an oscilloscope. Find the amplitude and period of the sine wave graph. On the vertical scale, each square represents 0.5; on the horizontal scale, each square represents 30° or pi/6.

Answer 1

To solve the question, we will need to understand some definition

PERIOD: The period is the time it takes for one complete cycle of a harmonic oscillation

AMPLITUDE: The amplitude is the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.

To find the amplitude, we will have to count how many boxes there are from the equilibrium or mean position on the vertical axis and then multiply by 0.5.

The number of boxes is 8

Therefore, the amplitude will be

`\begin{gathered} 0.5*8=4 \\ =4 \end{gathered}`

Amplitude = 4 units

For the period, we will have to count the number of boxes within one period

There are four boxes within one period. Since we know that each box on the horizontal axis is 30 degrees

or pi/6

The period will be

`\begin{gathered} 30^0*4=120^0 \\ or \\ (\pi)/(6)*4=(2)/(3)\pi \end{gathered}`