Modern physics is the post-Newtonian conception of physics. It implies that classical descriptions of phenomena are lacking, and that an accurate, "modern", description of nature requires theories to incorporate elements of quantum mechanics or Einsteinian relativity, or both.
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Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. The key point here is that if there is no net force acting on an object (if all the external forces cancel each other out) then the object will maintain a constant velocity. If that velocity is zero, then the object remains at rest. If an external force is applied, the velocity will change because of the force. Read more about each of the laws: https://www.grc.nasa.gov/www/k-12/airplane/newton.html For the first time, physicists have cooled a mechanical object to a temperature colder than previously thought possible, taking it below the so-called "quantum limit" and bending the laws of physics. READ MORE: http://www.sciencealert.com/scientists-have-cooled-an-object-beyond-the-icy-limits-of-physics The spectacular announcement that ripples in the very fabric of spacetime itself had been found (and from surprisingly massive black holes colliding) sent similarly massive ripples through the scientific community. The discovery was made using the Laser Interferometer Gravitational-Wave Observatory (LIGO) and represents a fundamentally new sense with which to see the universe. Read more: http://www.dailymail.co.uk/sciencetech/article-4073978/From-gravitational-waves-discovery-Earth-2-0-5-astrophysics-achievements-2016- |
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