Title:INTRODUCTION TO TEACH MECHANICAL ENERGY CONSERVATION, GIAR CRANK MECHANISM / Introducción para enseñar el concepto de conservación de la energía mecánica, mecanismo biela-manivela
Title:THE CONCEPTS OF ENVIRONMENT, ENVIRONMENT AND NATURE IN THE CONTEXT OF ENVIRONMENTAL ISSUE: DEFINING MEANINGS / Os conceitos de ambiente, meio ambiente e natureza no contexto da temática ambiental: definindo significados