1.- ¿Por qué será que los científicos de hace unos siglos no escogieron un patrón de medida por ejemplo un pedazo de varilla metálica para usarla como patrón de
medida y así ahorrarse miles de horas de mucho trabajo para encontrar una medida invariante del metro?

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?