If a large rock had collapsed in a desert or a tree had fallen in the heart of a distant forest several hundred miles away from living beings, would it have made a sound upon its fall? Different people will give different answers to this ancient question. Objectively, some will say that a sound would have been heard because sound does not exist only in the mind of the listener. Subjectively, some would say that a sound requires someone to listen to it. What is correct? Is this complex answer related to the essence of sound? It's All in the Sound investigates the phenomenon of sound and tries to understand it and answer, among other things, the above questions. It was written to meet the needs of students and teachers, with a desire to update the teaching of physics and fill the shortage of textbooks in this field, which is associated with teaching the subject of sound waves. The gradual development of the concept of sound is discussed in the book by building structured experimental illustrations, as well as mathematical expressions describing this miraculous phenomenon. The illustrations were chosen so that a curious reader could repeat most of the experiments in a home environment without the need for special laboratory equipment. Even for readers unfamiliar with the basics of physical mathematics that describe sound, this book may provide a unique experience and open up a new window to understanding physics.

In 1905, Albert Einstein astounded the scientific world when he proposed a theory that would become known as the special theory of relativity. Einstein's theory revolutionized the fundamental concepts of time and space, demonstrated the equivalence between mass and energy, and completely changed the face of modern physics. Despite its enormous importance, the theory of special relativity has remained largely unknown to the public interested in the scientific revolutions of the twentieth century. This book presents the theory of special relativity in a way that any student of the natural sciences can understand the theory itself, the crisis that led to its emergence, and its dramatic impact on the world of science. The book takes the reader on a fascinating, yet entertaining, journey of discovery and understanding of the theory of special relativity.

Einstein’s revolution traces back to his key papers of 1905 in which he questioned the classical understanding of our concepts of space, time, matter, gravitation, and radiation, shaking the foundations of classical physics. These papers challenged the idea of light as a wave, gave striking proof for the existence of atoms, led to a new understanding of space and time, which came to be known as the “special theory of relativity,” and identified mass as a form of energy. Ten years later, Einstein completed his relativity revolution with his masterpiece, the general theory of relativity, which became the source of modern cosmology. Albert Einstein : Creator of a Worldview deals with these developments, with the ideas which led to them and with their consequences. It also describes briefly Einstein’s activity outside the world of physics and his reaction to major issues on the agenda of mankind in his time.

In the 1940s, Erwin Schrödinger attempted to tackle the eternal question "What is Life?" from the perspective of the "naïve physicist." The result is this short book, which has influenced generations of scientists, sparked much controversy and become a classic. What Is Life? appears in Hebrew for the first time, accompanied by an epilogue by Prof. Avshalom Elitzur, who demonstrates to what extent Schrödinger's insights are relevant eighty years after the first publication of the essay.

This book is published as part of a series of textbooks for electrical engineers by Dima Budansky. The series is intended for students studying electrical engineering by the curriculum of the Israeli Ministry of Economy. The author of the book has rich experience of about thirty years in teaching and working as a licensed electrical engineer in the fields of planning, execution and maintenance of electrical installations. The first part of the book combines topics included in the curriculum and solving questions from the MHT (Technological Training Institute) tests. The second part is a collection of test solutions from recent years.

This book is published in the series of textbooks for electrical engineers by Dima Budansky. The series includes additional textbooks in the various professions and is intended for students studying electrical engineering according to the curriculum of the Ministry of Economy. The author of the book has a rich experience of about thirty years in teaching and working as a licensed electrical engineer in planning, execution and maintenance of electrical installations. The first part of the book combines subjects included in the curriculum with the Technological Training Institute test questions from recent years. The second part is a collection of solutions to these tests. The appendices chapter presents technical data sheets for electrical equipment, which are required to perform calculations.

If a large rock had collapsed in a desert or a tree had fallen in the heart of a distant forest several hundred miles away from living beings, would it have made a sound upon its fall? Different people will give different answers to this ancient question. Objectively, some will say that a sound would have been heard because sound does not exist only in the mind of the listener. Subjectively, some would say that a sound requires someone to listen to it. What is correct? Is this complex answer related to the essence of sound? It's All in the Sound investigates the phenomenon of sound and tries to understand it and answer, among other things, the above questions. It was written to meet the needs of students and teachers, with a desire to update the teaching of physics and fill the shortage of textbooks in this field, which is associated with teaching the subject of sound waves. The gradual development of the concept of sound is discussed in the book by building structured experimental illustrations, as well as mathematical expressions describing this miraculous phenomenon. The illustrations were chosen so that a curious reader could repeat most of the experiments in a home environment without the need for special laboratory equipment. Even for readers unfamiliar with the basics of physical mathematics that describe sound, this book may provide a unique experience and open up a new window to understanding physics.

The book describes the Copernican Revolution, initiated by the publication of On the Revolution of the Heavenly Spheres by Copernicus until it was accepted by the Scientific Community. The book follows the dramatic turns of the plot of the struggle for scientific truth, along with the conflict between the church and Galileo. Finally, the book brings the modern proofs for the Copernican model, including the very recent discoveries of extra-solar planets.

The book takes the reader on a journey of discovery ranging from the planets of our solar system to stars and distant solar systems in the Milky Way, our home galaxy, and beyond to the ends of the universe. It proposes a reader-friendly introduction to astrophysics and the physics of stars and planets, accompanied by over one hundred illustrations. The book explains concepts, distances and phenomena from other worlds, very different from our everyday experience. Throughout its journey through the universe the book introduces the science of astrobiology: the search for biological life in space. It also accompanies the course "Astrobiology and Life in the Universe" presented by the author and recorded for the benefit of the public in the "Cornerstones" program of the Hebrew University. The book deals with topics that have received widespread media coverage in recent years, such as NASA's research missions to Mars and their Kepler and James Web space telescopes. While the Kepler mission led in 2010-2015 to a breakthrough in discovering numerous worlds suitable for life outside the Solar System, James Web, whose launch is expected in 2021, will provide to humanity for the first time the ability to detect signs of life in these worlds.

In 1915 Albert Einstein started writing this booklet in an attempt to provide readers who do not necessarily possess knowledge of theoretical physics with an accurate understanding of one of the highest intellectual achievements of the human mind, the theory of the relativity. This friendly brain-challenge is written in the form of a dynamic dialogue, yet it also requires a substantial intellectual effort from the reader. In this important scientific document, the reader is taken on a journey through Einstein’s special and general relativity theories.