Densities are useful in summarizing the total charge, current, mass, or whatever that is present in a distribution. While the ratio of the quantity over the region of space may seem unimportant, many fields of physics use these densities:...
Current definitions are nominal, geometric, dosimetric (actual) or equivalent field size. In reality most detectors are not water equivalent since they contain air or high density materials. These materials can blur profiles, particularly in small fields. If necessary, detector and field size-...
No, current density is not a property of the medium. It's not a property of the medium itself, but it can be related to some property of the medium, like resistivity σσ, and to other electromagnetic quantities, like the electric ee field at some point of the medium rr, as an examp...
They can trace trajectories that can cross any point in the area such that the number of possible trajectories is the number of points in the area, which is just the area itself. Which means that the current density JJ is just the flow jj divided by the areaextension of the finish-area...
Intensity in Physics | Definition & Formula from Chapter 5 / Lesson 10 49K This lesson explains what wave intensity in physics is, and it explains the intensity of light formula with examples. This lesson also describes how to calculate intensity of sound waves. Related...
A) equal to the critical density if the universe is closed. B) equal to the critical density if the universe is flat. C) greater than the critical density if the universe is flat. D) greater than the critical density if the universe is open. E) none of the above Physics news on Phy...
tunnel through the barrier. The tunneling current is defined as the ratio of the current density emerging from the barrier divided by the current density incident on the barrier. If this transmission coefficient across the barrier is a non-zero value, then there exists a finite possibility that ...
abouteitherthepastorthefuture.Thisisknown as“mindwandering”.Duringtheseeventswe?re notpayingattentiontothecurrentworldaround us.Instead,we?rerecallingmemories,orcreating andprocessingimaginedfutures. Whenengagedin mindwandering,ourbrains processthesementalimagesusingthesamepathways usedtoreceiveinputsfromthereal...
Class 11 PHYSICS What are dimensions of a physical quanti... What are dimensions of a physical quantity? Video Solution Struggling with Dimensions ? Get free crash course Text SolutionGenerated By DoubtnutGPT Step-by-Step Solution 1. Understanding Physical Quantities: - A physical quantity is ...
What is the most stable B24N24 fullerene? B3LYP/6-31G* density functional theory calculations have been carried out on the structure and stability of seven B 24N 24 clusters. It is found that the n... HS Wu,H Jiao - 《Chemical Physics Letters》 被引量: 87发表: 2004年 Besides N2, ...