El magnetismo (Magnetism)

Newton's laws aren't the easiest science topics to digest. Struggling readers likely find understanding them even harder. This volume breaks down the topics of force and motion to its most basic and understandable parts, perfect to introduce to readers having a hard time or students looking to review for class. Written in succinct language, each chapter contains fact boxes and graphic organizers to aid all readers as they move from speed, to velocity and on.

The US president is the face of the United States to the rest of the world. However, he or she doesn’t have unlimited power within the country. The president has certain powers given by the Constitution, including the ability to make treaties, appoint some important government officials, and veto laws. Readers learn the many duties of the president in simple, clear language appropriate for both younger readers and older readers looking for a succinct review of the topic. Fact boxes supplement the main content with important details about checks and balances, amendments, and more that affect...

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

La cultura medieval islámica ha dado figuras espléndidas. Omar Jayyam, poeta y filósofo, algebrista y astrónomo, es sin duda la más fascinante de todas. Su pensamiento fue heterodoxo, su saber inmenso, su obra variadísima. De lo que nos ha llegado de su poesía no siempre es fácil distinguir lo auténtico de lo apócrifo, y de lo que sabemos de su vida, la historia de la leyenda. Su más importante aportación algebraica, la resolución sistemática de las ecuaciones cúbicas cortando cónicas, se procurará poner al alcance de un lector moderno sin alterar las ideas de fondo.

Discusses the physical characteristics of great white sharks that combine to make them such able predators.

Charles Taylor es probablemente -junto a su amigo e interlocutor, Jürgen Habermas- uno de los filósofos más influyentes de la segunda mitad del siglo XX. Ágil, vivaz y enérgico, su pensamiento forma parte de los grandes clásicos de la historia del pensamiento filosófico occidental. Su naturaleza comprometida -que le llevó a participar en la política quebequense en su juventud- y su significativa contribución -no siempre justamente comprendida- en el debate entre comunitarismo y liberalismo en la década de los noventa contribuyeron a que Taylor fuese identificando como uno de los...