Empecemos de cero

Técnico electricista 14 – Curso visual y gráfico Protecciones eléctricas y tableros En esta clase analizaremos los principios de funcionamiento de los fusibles, las formas constructivas, y la operación de los interruptores termomagnéticos y diferenciales. Caracterizaremos los contactores, y explicaremos la construcción y clasificación de los tableros, veremos cómo se componen y los materiales utilizados para su construcción. Explicaremos los grados de protección IP relacionados con los tableros y mencionaremos los diversos accesorios que pueden utilizarse en tableros domiciliarios.

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....

This simple introduction to the symbols, celebration, and traditions of Christmas looks at the holiday from a child's point of view.

Ideal for English language learners, this Spanish-language series provides a lively first look at people and countries around the world. The simple text is supported by large, colorful photos. Titles feature an overview of each country's people, land, weather, homes, food, and lifestyle.