Which of the following power spectra was taken for a non-periodic data set (note the difference in scale for P): Power spectrum A Power spectrum B A. B. both, or neither?
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
![**Which of the following power spectra was taken for a non-periodic data set (note the difference in scale for P)?**
### Power Spectrum A
- **Graph Description**:
- The graph labeled "Power spectrum A" displays a continuous curve that starts with a high amplitude at low frequencies and gradually decreases as frequency increases. There are two noticeable peaks at the beginning, followed by a smooth decline.
### Power Spectrum B
- **Graph Description**:
- The graph labeled "Power spectrum B" consists of several sharp peaks at specific low frequencies, followed by a relatively flat and low amplitude region as frequency increases. The peaks suggest distinct dominant frequencies.
**Question: A, B, both, or neither?**](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F80624252-1099-44a7-a129-6e4dc1a5c385%2Ff6bad0ea-0505-4187-bd28-f69b832a44dd%2F0kxg43_processed.jpeg&w=3840&q=75)
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