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Chapter xxxxxx INTRODUCTION AND BASIC CONCEPTS
Thermodynamics xxxxxxxxxxxxC Classical thermodynamics is based on experimental observations whereas statistical thermodynamics is based on the average behavior of large groups of particles. xxxxxx2C On a downhill road the potential energy of the bicyclist is being converted to kinetic energy, and thus the bicyclist picks up speed. There is no creation of energy, and thus no violation of the conservation of energy principle. xxxxxx3C There is no truth to his claim. It violates the second law of thermodynamics.
Mass, Force, and Units xxxxxx4C Poundmass lbm is the mass unit in English system whereas poundforce lbf is the force unit. One poundforce is the force required to accelerate a mass of 32.xxxxxx74 lbm by xxxxxx ft/s2. In other words, the weight of a xxxxxxlbm mass at sea level is xxxxxx lbf. xxxxxx5C Kgmass is the mass unit in the SI system whereas kgforce is a force unit. xxxxxxkgforce is the force re¡¦(»ý·«)
quired to accelerate a xxxxxxkg mass by 9.807 m/s2. In other words, the we
