In a motor, electrical current enters through the brushes. Please select the best answer from the choices provided

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THE ANSWER IS TRUE

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th