Ch 1. Basics Multimedia Engineering Thermodynamics System Temperature& Pressure Heat andWork Energy
 Chapter 1. Basics 2. Pure Substances 3. First Law 4. Energy Analysis 5. Second Law 6. Entropy 7. Exergy Analysis 8. Gas Power Cyc 9. Brayton Cycle 10. Rankine Cycle Appendix Basic Math Units Thermo Tables Search eBooks Dynamics Fluids Math Mechanics Statics Thermodynamics Author(s): Meirong Huang Kurt Gramoll ©Kurt Gramoll

 THERMODYNAMICS - CASE STUDY Introduction Bob's Bad Day Bob went home with a red print on his face yesterday. He was involved in a fight in school. Someone slapped his face which caused the temperature of the affected area of his face to rise. How fast the slapping hand is? Known: The mass of the slapping hand mhand = 1.5 kg The mass of the affected tissue maffected tissue = 0.2 kg The specific heat of the tissue c = 3.8 kJ/(kg-oC) Temperature of face rise 1.5oC Questions Determine the velocity of the hand just before impact. Approach System Take the hand and the affected portion of the face as a system The energy equation: Ein - Eout = ΔEsystem               = (ΔU + ΔKE + ΔPE)affected tissue +                  (ΔU + ΔKE + ΔPE)hand