Curso de electricidad general

Written for mechanics and technicians, this course explains the function, measurements, components, and instruments of combustion motors. Cylinder placement and construction, heat measurements, workings of dual engines, and starter systems are studied. Presented in a step-by-step format that features numerous drawings, each lesson begins with an objective and an introduction to the theory and concept.

What's the first step in making milk? It starts with a cow eating grass! Learn about all of the steps in the process of making milk, from start to finish. Now in Spanish.

El monitoreo del contenido de carbono en ecosistemas de alta montaña ha cobrado importancia en la actualidad, dado el papel potencial que éstos pueden desempeñar como sumideros o fuentes del mismo y, consecuentemente, como reductores de la emisión de gases de efecto invernadero. La primera Comunicación Nacional (CN1) de Colombia para la Convención Marco de Naciones Unidas para el Cambio Climático determinó que uno de los tipos de ecosistemas colombianos más vulnerables a los efectos del cambio climático serían los de alta montaña. Con un aumento proyectado para el 2050 en la...

"An urgent and expert investigation into behavioral addiction, the dark flipside of today's unavoidable digital technologies, and how we can turn the tide to regain control. Behavioral addiction may prove to be one of the most important fields of social, medical, and psychological research in our lifetime. The idea that behaviors can be being addictive is new, but the threat is near universal. Experts are just beginning to acknowledge that we are all potential addicts. Adam Alter, a professor of psychology and marketing at NYU, is at the cutting edge of research into what makes these products ...