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Q2 (30 points) a. What is the main driving force of heat transfer? (10 points) b. Which device is used when cooling a fluid at

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Q2 (30 points) a. What is the main driving force of heat transfer? (10 points) b. Which device is used when cooling a fluid at very low temperature? (10 points) C. Describe briefly what happens if object A at 75C comes to contact with object Bat 15C? (10 points)

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