Medir la velocidad (Measuring Speed)

Provides information on the tiny reptiles, including their use of color as a defense, their climbing skills, and their ability to grow back a missing tail.

The Underground Railroad was the massive effort by slaves and free people to secretly bring thousands of blacks to freedom in the North during the 19th century. This thought-provoking book will capture readers’ imaginations and fill them with awe for the brave “conductors” and “passengers” on the Railroad. They’ll learn about the many safe havens, called “depots,” that housed fugitives and the secret passages within them that hid slaves from their pursuers. Information about the American Civil War and the Fugitive Slave Act, biographies of figures vital to the Underground Railroad,...

Jorge Fernández le teme a casi todo. Pero como el miedo no dura para siempre, Jorge debe enfrentar no sólo sus temores, también a varios zombis, a un conde rumano, a dos luchadores, a unas invasoras venusinas y hasta a la mismísima muerte.

Este libro está principalmente destinado a los estudiantes de las diversas asignaturas del área de Mecánica de fluidos de la E.T.S. de Ingenieros Industriales de la UNED, aunque también puede ser de utilidad para otros estudiantes universitarios de ingeniería, especialmente en la etapa inicial en la que, después de haber estudiado los conceptos teóricos, se disponen a abordar los primeros ejercicios. Para la mayoría de los 224 problemas y ejercicios se proporcionan procedimientos de resolución detallados. En algunos casos se indican esquemáticamente los pasos a seguir y en otros se...

One of the skills employers want most in new hires is the ability to speak well. Public speaking can not only advance a person in almost any career but can also help an individual do better in school as well. Following the English Language Arts standards for Speaking and Listening, this book teaches readers why public speaking can be such an effective tool, how to craft a powerful speech, and how to overcome one of the most common problems people have with talking in front of a crowd�stage fright.