Search results
Jan 27, 2022 · 5. The mass of an object is a fundamental property of the object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object. Definitions of mass often seem circular because it is such a fundamental quantity that it is hard to define in terms of something else. All mechanical quantities can be defined in ...
Jul 21, 2013 · Mass manifests itself as 1) resistance to changes in velocity (inertial mass), and 2) the source of gravitational changes in velocity (gravitational mass). Galileo Galilei was the first person to formulate coherent thoughts on inertial and gravitational mass and their equivalence. His insights were based on experiments with rolling balls on ...
Let us define the inertial mass, gravitational mass and rest mass of a particle. Inertial mass: To every particle in nature we can associate a real number with it so that the value of the number gives the measure of inertia (the amount of resistance of the particle to accelerate for a definite force applied on it) of the particle.
Etot = Mc2 E t o t = M c 2. we can think about a photon as having "an effective" mass. Meff = E/c2 M e f f = E / c 2. However, this fact does NOT mean the photon has "mass". It only means that its energetic content can be "seen" in terms of mass due to the equivalence of energy and matter.
Apr 30, 2015 · 4. We almost always determine mass by measuring weight. Weight is the force on an object exterted by a gravitational field, and is proportional to the mass. On the Earth's surface W = m*g. We can convert weight to mass if our measuring scale is calibrated, usually with an object of known mass. This would work for any planet.
Nov 9, 2017 · Such negative mass gravitons will still obey these equations (because the square of a negative number is a positive number, just like the square of a positive number). Can anyone in this forum give any reason why gravitons cannot have a negative mass? Of course, general relativity (GR) is compatible only with gravitons having a zero mass.
Jul 11, 2012 · In real materials, the effective mass is usually close to the electron mass, but sometimes can be hundreds of times bigger. If you fill up all the electron states, and consider one hole, there is an amplitude for the hole to hop to a neighboring location. This gives an effective mass as above, proportional to the inverse hopping amplitude.
Dec 28, 2023 · The possible answer that a unified definition of mass (across all disciplines) is currently not mainstream is itself an answer within the realm of mainstream science. – MaximusIdeal. Dec 29, 2023 at 2:21. 3. @Alfred, there is no possible place in which that obsolete concept is of any use.
Aug 31, 2018 · To have the motion of each mass, simply add the position of the center of mass to the position of the mass relative to the center of mass. Now, solve the problem using the equations of motion for each mass. Therefore, there will be two forces on each mass: the gravitational force, and the spring force.
Mar 12, 2015 · 17. The other answers explain that there's no paradox but they don't explain why the particular particle called photon is massless. It's massless because it is the messenger particle responsible for electromagnetism which is a long-range force. Its range is infinite so the mass has to be zero. One may view the Coulomb potential as the zero-mass ...
