Assaying (3) Reality (3) Mechanical movements (3) Markets (3) Force and energy (3) Electricity (3) Electric power (3) Day (3) Attention (3) Prices (3) Design (3) Analysis (3) Reactivity (3) Effectiveness (3) Performance (3) First performances (3) Experiments (3) Energía (Física) (3) Mecanismos (3) Realidad (3) Diseño (3) Electricidad (3) Precios (3) Mercados (3) Venta (3) Energía eléctrica (3) Gaine (3) Énergie (3) Électricité (3) Analyse (3)