Sivukartta Sulje physics FORM 1 1. INTRODUCTION TO PHYSICS 4.PRESSURE 5.PARTICULATE NATURE OF MATTER 6.THERMAL EXPANSION FORM 2 EQUILLIRIUM REFLECTION AT CURVED SURFACES FORM 3 CURRENT ELECTRICITY II ELECTROSTATICS HEATING EFFECT OF AN ELECTRIC CURRENT WAVES WAVES II FORM 4 ELECTROMAGNETIC SPECTRUM X-RAYS