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真正简单物理的惊人力量
The Surprising Power Of Really Simple Physics -...
www.forbes.com/sites/chadorzel/2016/10/12/the-surprising-pow...
Lifestyle
The Surprising Power Of Really Simple Physics
This makes sense on a conceptual level, and with a bit of careful reasoning, you can come up with some parameters for the model- the approximate size of the “balls” and the stiffness of the “springs.” Using those, you can then move on to consider a new phenomenon, the propagation of sound, by reasoning that any given atom in a chain can’t start vibrating until the one before it moves, and make a quantitative estimate of the speed of sound in a solid that agrees remarkably well with measured values. If you think about tension forces in terms of the stretching of innumerable microscopic springs, for example, it makes sense that the force is the same everywhere, and can only point along the string.
Forbes
LIGO能在2025年回答这个大问题
Thanks To LIGO, Science Will Have The Answer To...
www.forbes.com/sites/quora/2016/10/11/thanks-to-ligo-science...
Science
Thanks To LIGO, Science Will Have The Answer To This Big Question By 2025
What are the most important unanswered questions in natural science that are likely to be answered by 2025? originally appeared on Quora: the knowledge sharing network where compelling questions are answered by people with unique insights. Answer by Richard Muller, Professor of Physics at UC Berkeley, author of Now, The Physics of TimeQuora Is the general theory of relativity the correct description of gravity and space-time in the strong-field regime, near objects (such as black holes) in which orbits approach the speed of light? I believe we will soon know the answer by 2025 because of the fantastic success of the LIGO experiment in detecting merging black holes. I had not expected this; indeed,
Forbes
Gravitational Waves May Permanently Alter Spacetime - NOVA Next
麻省理工学院的物理学家模拟Magnetar寻找暗物质粒子
MIT Physicists Simulate a Magnetar to Seek Dark...
scitechdaily.com/mit-physicists-simulate
Science
MIT Physicists Simulate a Magnetar to Seek Dark Matter Particle
Physicists from MIT are proposing a new experiment to detect a dark matter particle called the axion. If successful, the effort could crack one of the most perplexing unsolved mysteries in particle physics, as well as finally yield a glimpse of dark matter. Axions are hypothetical elementary particles that are thought to be among the lightest particles in the universe - about one-quintillionth the size of a proton. These ultralight particles are virtually invisible, yet if they exist, axions and other yet-unobserved particles may make up 80 percent of the material in the universe, in the form of dark matter. In a paper published online in Physical Review Letters, the MIT team proposes an experiment
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