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If the periodic time of a body \( (\mathrm{X}) \) is double that of a body \( (\mathrm{Y}) \) so the ratio between th equency (Y) to the frequency \( (\mathrm{X}) \) is \( \ldots \ldots \)

Ask by Sherman Peters. in Egypt
Mar 11,2025

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Answer

The frequency of body \( (\mathrm{Y}) \) is twice that of body \( (\mathrm{X}) \), so the ratio \( \frac{f_{Y}}{f_{X}} = 2 \).

Solution

Given that frequency \( f = \frac{1}{T} \) and the periodic time of body \( (\mathrm{X}) \) is double that of body \( (\mathrm{Y}) \), we have: \[ T_{X} = 2T_{Y} \] Now, the frequency for each body is: \[ f_{X} = \frac{1}{T_{X}} \quad \text{and} \quad f_{Y} = \frac{1}{T_{Y}} \] To find the ratio of \( f_{Y} \) to \( f_{X} \): \[ \frac{f_{Y}}{f_{X}} = \frac{\frac{1}{T_{Y}}}{\frac{1}{T_{X}}} = \frac{T_{X}}{T_{Y}} \] Substitute \( T_{X} = 2T_{Y} \) into the equation: \[ \frac{f_{Y}}{f_{X}} = \frac{2T_{Y}}{T_{Y}} = 2 \] Thus, the ratio between the frequency of body \( (\mathrm{Y}) \) and the frequency of body \( (\mathrm{X}) \) is: \[ \frac{f_{Y}}{f_{X}} = 2 \]

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Bonus Knowledge

Did you know that the relationship between frequency and periodic time is inversely proportional? This means that if the periodic time of body \( \mathrm{X} \) is double that of body \( \mathrm{Y} \), then the frequency of body \( \mathrm{X} \) will be half that of body \( \mathrm{Y} \). So, if we denote the frequency of \( \mathrm{Y} \) as \( f_Y \) and that of \( \mathrm{X} \) as \( f_X \), we can say \( f_Y = 2f_X \). When it comes to calculating frequencies, it’s crucial to keep an eye on the definitions. A common mistake is to interchange frequency and periodic time. Remember, frequency is the number of cycles per second (or Hertz, Hz), while periodic time is the duration of one complete cycle. So if you ever feel stuck, just flip your understanding – more time means less frequency, and vice versa!

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