Ovid: "Echo and Narcissus" - TRANSLATION, Catullus: "How many kisses?" and "Conflicting emotions" - TRANSLATION, Catullus: "How many kisses?" and "Conflicting emotions" - NOTES...
4.1.1 Energy changes in a system, and the ways energy is stored before and after such changes, 4.1.2 Conservation and dissipation of energy, 4.1.3 National and global energy resources...