What is physics? Science and engineering are based on measurement and comparison. Therefore, we need rules about how things are measured and compared, and we need experiments to establish units for those measurements and comparisons. One of the goals of physics (and engineering) is to design and conduct such experiments.
For example, physicists strive to develop extremely accurate clocks so that any time or time interval can be accurately determined and compared. One might wonder whether such precision is really necessary or worth the effort. Here is an example of its value: without extremely accurate clocks, the Global Positioning System (GPS), currently essential for navigation around the world, would be useless.
Physics is based on the measurement of physical quantities. Some physical quantities are chosen as fundamental quantities (e.g., length, time, mass), each of which is defined in terms of a standard and given a unit (e.g.,meter, second, kilogram). Other physical quantities are defined in terms of the fundamental quantity and its standard and units.
About the Book
The tenth edition of Hallidays Fundamentals of Physics builds on previous issues by offering several new and additional features. The new edition offers the most accurate, extensive, and diverse set of assessment questions in the course management program, plus all questions include some form of question assistance, including answer-specific feedback, to facilitate successful completion. The book also provides multimedia presentations (videos and animations) for those who have difficulty reading scientific explanations.
In addition, the book includes math review content, both in self-study modules for deeper review and in just-in-time math videos for quick review of specific topics. Halliday’s content is widely accepted as clear, correct, and complete. The end-of-chapter problems are second to none, and the new design introduced in 9e has been retained in10e, making this new edition the most accessible and readable book on the market.