## Preface

This book of problems is intended as a textbook for students at

higher educational institutions studying advanced course in physics.

Besides, because of the great number of simple problems it may be used

by students studying a general course in physics.

The book contains about 1900 problems with hints for solving the

most complicated ones.

For students' convenience each chapter opens with a time-saving

summary of the principal formulas for the relevant area of physics. As a

rule the formulas are given without detailed explanations since a stu-

dent, starting solving a problem, is assumed to know the meaning of the

quantities appearing in the formulas. Explanatory notes are only given

in those cases when misunderstanding may arise.

All the formulas in the text and answers are in SI system, except in

Part Six, where the Gaussian system is used. Quantitative data and

answers are presented in accordance with the rules of approximation and

numerical accuracy.

The main physical constants and tables are summarised at the end of

the book.

The Periodic System of Elements is printed at the front end sheet

and the Table of Elementary Particles at the back sheet of the book.

In the present edition, some misprints are corrected, and a number

of problems are substituted by new ones, or the quantitative data in

them are changed or refined (1.273, 1.361, 2.189, 3.249, 3.97, 4.194 and

5.78).

In conclusion, the author wants to express his deep gratitude to col-

leagues from MIPhI and to readers who sent their remarks on some prob-

lems , helping thereby to improve the book.

`I.E. Irodov`