'X' نماد ناشناخته است: ۱۷ مقاله

“If all questions were answered, all riddles solved, every fold unfolded, every wrinkle in the fabric of the Universe smoothed—the greatest and noblest game in the Universe would be ended, and there would be nothing left for the mind to do but console itself with trivia. Unbearable! MAY X ALWAYS BE WITH US TO AFFORD US PLEASURE!”—Isaac Asimov Asimov is once again at his best: exploring, inspiring, hypothesizing, and teaching. Whether he’s imagining a world in which silicon molucules would serve as the basis for life, speculating on the limits (in both directions) of the electromagnetic spectrum, or simply fiddling around with algebraic equations, Asimov presents his characteristically brilliant essays on physics, chemistry, mathematics, and astronomy with the wit and wisdom that have made him the most popular writer of science today. “ASIMOV PRACTICES WITH HIGH GOOD HUMOR AND BRASH PLEASURE THE ROLE OF INFORMAL EXPLAINER-AT-LARGE TO THE UNIVERSE.”—The Wall Street Journal This book is a collection of short essays on various topics in Physics, Chemistry, Astronomy and Mathematics. Physics 1 Read Out Your Good Book in Verse (May 1982) 2 Four Hundred Octaves (June 1982) 3 The Three Who Died Too Soon (July 1982) 4 X Stands for Unknown (August 1982) Chemistry 5 Big Brother (September 1982) 6 Bread and Stone (October 1982) 7 A Difference of an 'E' (November 1982) 8 Silicon Life After All (December 1982) Astronomy 9 The Long Ellipse (January 1982) 10 Change of Time and State (April 1982) 11 Whatzisname's Orbit (March 1982) 12 Ready and Waiting (February 1983) 13 Dead Centre (April 1983) 14 Out in the Boondocks (May 1983) Mathematics 15 To Ungild Refinèd Gold (January 1983) 16 The Circle of the Earth (February 1982) 17 The Armies of the Night (March 1983) Discusses a wide range of topics from the fields of physics, chemistry, mathematics, and astronomy, analyzing such areas as the laws of electromagnetism, the light spectrum, astronomical phenomena, computer chips, and more