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Mechanical Engineering QUESTION #2417
Question 1
The thermal diffusivity \(\alpha\) is defined as:
  • \(\alpha = \rho c / k\)
  • \(\alpha = k / (\rho c)\)✔️
  • \(\alpha = k \cdot \rho \cdot c\)
  • \(\alpha = k / c\)
Correct Answer Explanation
Thermal diffusivity \(\alpha=k/(\rho c)\) (m²/s) characterizes how quickly a material responds to temperature changes. High \(\alpha\) means faster thermal response.