1.1 Physics: An Introduction

How principles, laws, models, and theories differ, and the range of scales physics organizes its questions around.

College Physics 2e, 1.1 Physics: An Introduction

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1.1 Exercise 1

Modern physics itself consists of the two revolutionary theories, relativity and quantum mechanics. These theories deal with the very fast and the very small, respectively. Relativity must be used whenever an object is traveling at greater than about 1% of the speed of light or experiences a strong gravitational field such as that near the Sun. Quantum mechanics must be used for objects smaller th…

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