Cómo podemos utilizar el tornillo?

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

En este breve libro, que no breviario, cabalgan hermanadas la poesía japonesa occidentalizada, vale decir el haiku y el senryu, que en apenas diecisiete silabas divididas en tres versos sin rima expresa diversos sentimientos; la glosa, el soneto, el madrigal y el poema libre, realengo, que no atiende las estrictas normas de la métrica. Cabalgan también cómodamente, en su carruaje poético, los recuerdos únicos de la tierra que me vio nacer, Marabal, donde quedó sembrado mi espíritu y que muchas veces visito en sueños, repetitivos, de añoranza, de arrepentimiento por el abandono, de...

Paul Klee está considerado uno de los representantes más originales e influyentes del arte moderno. Contrario a la tradición académica, creó un estilo propio alimentándose de las más diversas fuentes (inclusive los dibujos de su hijo). En su universo se mezcla el rigor geométrico y el mundo de lo imaginario, para lograr hacer visible lo invisible. Lee este libro y descubrirás cómo su nombre y su obra se extendieron por el mundo entero.

Postmodernism represents incredible challenges, but the beauty is that we can find in the Bible many characters who had to confront similar tests to the ones we face today.

As a successful former slave, Clara Brown used her money to help other freed slaves get a new start in life. In 1859 Clara bought her own freedom and headed west to Colorado to find her daughter, who was sold when she was just a little girl. Clara didn't find her daughter there, but she did get rich. The people she helped became her family, and she became known as "Aunt" Clara Brown.