Book is addressed to two different audiences: physics community; and non-scientists interested in physics. To accommodate non-scientists minimal math is used. Whenever it is used it is accompanied with word descriptions to explain what it means. In addition each chapter is preceded with simple non-math descriptions of what chapter is saying.
Main theme of book is that the machinery of gravity is all matter is accelerating forever. The book explores this idea, shows it is a feasible interpretation of facts, explains why this is true, applies the teachings to six problems in physics finding simpler solutions for them, and solutions for several where none are at present are known. The six are: (1) Bending of starlight; (2) Advance of Mercuries perihelion; (3) Explanation for behavior of spiral galaxies, (4) Expansion of earth, (5) Anomalous acceleration terms of Pioneer 10 and 11, (6) Accelerated expansion of universe.
The book starts by citing Einstein's metaphor of observer in accelerated chest unable to distinguish that state with his being "at rest" on the earth. This was his "Principle of Equivalence" that started his development of his gravity theory (General Relativity). Obvious/intuitive rejection of this idea is that Newton's gravity law cannot be violated and it would seem (for example) that if I had two spheres of same size, but different densities, the denser sphere would have to get larger than the other one to accommodate its greater gravity field. I use Newton's law to show one's intuition is wrong . They stay very nearly the same size because (from Einstein 1905) nothing can go faster than the speed of light and what remains "almost time invariant" is the ratio of sizes. End up with two simple equations; (1) Exact size of any object after a long time has passed; (2) Approximate size after a long time has passed. The second of these is the commonly used definition of size.(time lapse for a pulse of light to travel the length of some object).
THE DIFFERENCE BETWEEN THESE TWO EQUATIONS IS THE SMALL QUANTITY THAT BECOMES MEASURABLE UNDER CERTAIN CONDITIONS AND CAN BE USED TO TEST IF THIS EXPANSION IDEA IS VALID OR NOT. IT ALSO IS USED IN EACH AND EVERY ONE OF THE SIX EXAMPLES DESCRIBED JUST ABOVE TO FIND SOLUTIONS.
The first part of the book explores how think about gravity in these terms and supplies additional reasoning (mainly related to the second law of thermodynamics) why this view of gravity is possibly (probably) correct. The middle part of the book applies the concept to the six physics problems as stated above. The last part of the book critiques all of it making clear that further testing is needed. The expansion of the earth chapter suggests one appropriate test. An essay on truth is added as a final item.
For decades, his family rescued lost and forgotten donkeys in the Irish countryside.He had no idea that one day, the donkeys would rescue him.Patrick Barrett grew up on the back of a donkey. In the small village of Liscarroll, the young boy helped his family run a sanctuary for abandoned and abused donkeys. Struggling in school, Patrick only felt truly accepted in the presence of these funny, fuzzy, touching animals. It was like magic, how he and the donkeys understood each other. He became a true “donkey whisperer”―reading their body language, communicating with them in ways they could understand, and teaching himself how to “speak” in their distinctive calls.But when Patrick was of age, he shipped out with the Irish Army and encountered unimaginable wartime horrors in Lebanon and Kosovo. In the aftermath, he returned home a broken man, sinking into the depths of PTSD and addictions. He believed nothing could save him. But he hadn’t counted on the donkeys.Sanctuary is the remarkable true story of how faith turned one lost man’s life around with the help of the rescue animals who loved him. It’s an antidote to despair and a call to hope, revealing the beauty and wonder of Ireland as you’ve never seen it before.
Scientist and former priest Haisch says, “I see God as a macro-designer, one whose ideas become the laws of physics.” He presents a theory of how the gap between science and religion is thinner than one might believe.
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From the bestselling author of The End of Nature comes a passionate plea to limit the technologies that could change the very definition of who we are
We are on the verge of crossing the line from born to made, from created to built. Sometime in the next few years, a scientist will reprogram a human egg or sperm cell, spawning a genetic change that could be passed down into eternity. We are sleepwalking toward the future, argues Bill McKibben, and it's time to open our eyes.
In The End of Nature, nearly fifteen years ago, McKibben demonstrated that humanity had begun to irrevocably alter--and endanger--our environment on a global scale. Now he turns his eye to an array of technologies that could change our relationship not with the rest of nature but with ourselves. He explores the frontiers of genetic engineering, robotics, and nanotechnology--all of which we are approaching with astonishing speed--and shows that each threatens to take us past a point of no return. We now stand at a critical threshold, poised between the human past and a post-human future.
Ultimately, McKibben offers a celebration of what it means to be human, and a warning that we risk the loss of all meaning if we step across the threshold. His wise and eloquent book argues that we cannot forever grow in reach and power--that we must at last learn how to say, "Enough."
"Passionate, succinct, chilling, closely argued, sometimes hilarious, touchingly well-intentioned, and essential." —Margaret Atwood, The New York Review of Books
Internet is perhaps one of the most prestigious indispensable tools of modern times where people simply cannot imagine a life without it, or even the world without it. It makes planet earth go round and helps to move it forward. It is one of the primary essence of technological evolution. Every era has had its own indispensable tool – for us in these modern times, it is none other than the world-wide web.
Having such humble beginnings in the university campuses of American institutes in the 1960s, internet would soon become a global phenomenon, a concept and a medium on its own. Universities now teach the origins of internet and how it has shaped mankind in the last 60 years. It has its own nuances and the little nuts and bolts that need to be known and be aware of if one aspires to become a professional web designer. It is indeed a field of study and involves continuous scrutiny and observation if one needs to understand how this global phenomenon really became global in technical sense and how it governs almost everything we see around us.
In this book, a brief understanding of the origins and evolution of internet will be discussed and how it has grown to become one of the foremost tools for almost everything that surround people. In short, a brief, interesting history of the internet, and its evolution.
With their building prowess and distinctive features, beavers are a rare, but wonderful sight in UK waters following their extinction and re-introduction. Through informative chapters ranging from the psychological and environment to the inclusion of the beaver in myth, legend, art and literature, The Beaver Book is an ideal guide to its subject for all nature lovers, beautifully illustrated throughout with photography and artwork.
With record numbers of beavers set to be reintroduced across the UK in 2021, securing the place of this mammal in the country’s ecosystem for generation’s to come, this is both a relevant and timely publication.
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