why was maxwell given the credit to gauss's integral (flux) equation?
why was maxwell given the credit to gauss's integral (flux) equation?
View ArticleNeed a suggestion for an assignment on fiber optics.
I am finishing a course on Eletromagnetism and Optics. I am currently a physics student in the second year of university. I passed the final exam and now I'm supposed to do a work on fiber optics. Do...
View ArticleElectric field and electric potential
hi, electric filed is a vector and electric potential is scalar. Gradient of electric potential give us electric filed - plz explain by which space we can describe both quantities. thanks
View ArticleHow exactly is tension exerted?
Say you have a rope looped around a frictionless pulley, and a mass m is attached to each side of the rope. When the system is released, the tension in the rope is T = mg, and the total force exerted...
View ArticleNotion of Entropy
Everybody says entropy of the universe is increasing. But after the big bang, matter formed, it came together, stars and galaxies were formed, on a small planet called Earth atoms/molecules came...
View ArticleWork notion
Hello, I have trouble to get what work is. I find physics notions difficult to understand and I'm kinda bit astray like Rainman in that movie when he walks that moving walkway the wrong way, realizing...
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Far Field lens Imaging Does k-wave number follow arc length equation?
If we are imaging light in the far field region. We have three situations/relations (illustrated below): Arc Length: We know the distance subtended (S) by the light ray in a lens-less system will be...
View ArticleAchieving bigger popcorn through vacuum pump
I'm tutoring a high-school level student where one of the questions is asking why fitting a vacuum pump to a popcorn maker would cause the popped kernels to get bigger. For those unfamiliar with...
View Articlehow can 2 signals go thru copper wire?
talking to someone about direct tv systems, how they talk between HD boxes over the rg6 coax line one person said one part sends a signal and it travels down the center of the center coax conductor and...
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Mathematical method in electrical potential ??
Hi All, I need mathematical help from the topic electrical potential for lectures on physics by Richard Feynman. Need some help to understand mathematical method used here. question : 1) From...
View ArticleAbout Electrostatic Potential and Electric Field
How do I know if E (electric field) and [itex]\Phi[/itex] (electrostatic potential) is continuous at the surface? I'm asking this because I have a problem choosing which formula to use, if you know...
View ArticleGravity conservation / gravitational forces
Why are gravitational forces said to be conservative ? What does conservative mean here ?
View ArticleQuestion About Conservation of Momentum
This has been bugging me for a while. Imagine a pendulum swinging. Since it has mass and velocity, it has momentum. After a while, though, it will swing with less and less amplitude until it has...
View ArticleMaximum compression of Spring Blocks System
Block 1 has a mass of 2kg and is moving to the right on a frictionless surface at 10m/s. Block 2 is ahead of Block 1, has a mass of 5 kg, and is moving to the right at 3m/s. Block 2 also has a spring...
View ArticleSurface Volume and Line charge densities, how to solve problems?
This question is a perfect example: A solid sphere 25cm in radius carries 14microC, distributed uniformly throughout it's volume. Find the electric field strength a) 15cm b)25cm and c)50 cm from...
View ArticleWould lots of sounds tend to cancel out?
My understanding of sound waves is that they are waves of high and low pressure. So if there were a lot of identical sounds, but randomly out of phase, would they tend to cancel each other out,...
View ArticleEmergent Entropic Thermodynamic Force
I have just watched a video lecture from Robbert Dijkgraaf at Gresham College where he describes gravitation as an emergent entropic thermodynamic force. The video link is listed in reference and the...
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Transient 1D radial conduction
Morning all, This is probably going to seem absurdly simple, however I need to do a very quick conduction calculation as part of a much larger problem I am working on. I was wondering if anyone would...
View ArticleGas flow from one chamber to another
Hi, I don't know a ton of fluid mechanics, and haven't been able to mathematically define this problem, so I was hoping someone might have an idea. The problem I want to solve is the time it takes for...
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