Practice question
यांत्रिक और तरल घर्षण किसके प्रमुख कारण हैं?
- 1थर्मल डिग्रेडेशन
- 2उत्क्रमणीयता (reversibility)
- 3दक्षता में कमी
- 4अनुत्क्रमणीयता (irreversibility)✓
सही उत्तर देखें
अनुत्क्रमणीयता (irreversibility)
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