aPhysics is an experimental science. Experiments require measurements, and we generally use numbers to describe the results of measurements. Any number that is used to describe a physical phenomenon quantitatively is called a physical quantity (物理量). 物理是实验性科学。 实验要求测量,并且我们一般使...
are the physical quantity or entity which are believed to have a constant value in time and are universal. table of contents nature of physical constants number of fundamental constants table of physical constants frequently asked questions – faqs nature of physical constants based on nature, the ...
must be described and measured in terms which have the same meaning for everyone. The measuring device or instrument is calibrated (that is, the functional relationship between its indication and the magnitude of the measured quantity is determined) by direct or indirect comparison with a standard ...
pulsation - a periodically recurring phenomenon that alternately increases and decreases some quantity 2. phenomenon - a remarkable development development - a recent event that has some relevance for the present situation; "recent developments in Iraq"; "what a revolting development!" Based on WordNe...
In the model proposed here, the inhomogeneous magnetic system is composed by many Maxwell-Boltzmann homogeneous bits and the entropic parameter q is related to the moments of the distribution of the inhomogeneous quantity. From the analysis of Scanning Tunnelling Spectroscopy (STS) images, the q ...
Both are properties of populations, or aggregates, true irrespective of the nature of the units which compose them; both are statistical laws; each requires the constant increase of a measurable quantity, in the one case the entropy of a physical system and in the other the fitness, measured...
(orspectral radiance, but I’m trying to keep away from spectra and color in this already overlong post). It’s a key quantity for us, since it is independent of distance. When we shoot a ray from the eye, our goal is to compute the luminance for that ray, for display. If we’...
He is also interested in understanding the underlying meaning of string dualities, as well as trying to apply superstring theory to some unsolved questions of elementary particlephysicssuch as the hierarchy problem and the cosmologicalconstantproblem. ...
Continuity equation Physical meaning P1. Which equation can be used to get the continuity equation from Maxwell’s eqns? a) 3 b) 4 c) 5 d) 6 e)7 Maxwell’s equations in vacuum To derive any wave equation, we have to differentiate equations and then substitute into each other. P2. ...
What is the difference between the meaning of measurement and the value of measurement in physics? How is quantum entanglement related to decoherence? Which among the two is fundamental physical quantity? Ampere(A) or Charge(Q) What is the Heisenberg uncertainty principle? Does it place limits on...