Kilometres in a Lightyear
I was wondering if my measurements book that states there are 9,460,000 km in a lightyear is correct. I raise this question because I have recently done some calculations that resulted in my answer...
View ArticleWave and Particle Mass Energy Forms
I was wondering that since most forms of energy can either be in wave or particle form, (example; photons and electromagnetic wave) and also since mass is also a form of energy, could mass energy also...
View ArticleElectric field lines from a solid charged sphere.?
What would be the pattern of electric field lines 'inside' a solid charged sphere..?
View Articlethings about vortex tube :P
this is written in wiki: "There are different explanations for the effect and there is debate on which explanation is best or correct. What is usually agreed upon is that the air in the tube...
View ArticleExplanation required in stable and unstable potential energy.
Walter Lewin at MIT says that at a point of stable potential energy(like the troughs of a wavy surface), d^2u/dx^2 will be positive And at a point of unstable potential energy(like the crests of a wavy...
View ArticleSimple harmonic motion
I was reading a book on wave and found that when they derive the equation of shm from the equation force varies with negetive displacement , they had taken a propotionality constant to make the force...
View Articlequestion on short wavelength EM scattering (Jackson)
In Jackson Classical Electrodynamics (P. 498) Eqs 10.130 and 10.132, which describes waves from a conducting sphere at short wave length limit, seem to be derived using k(reflected wave...
View Articlefind entropy change for free expantion of ideal gas
entropy = jouls/kelvin supose 1 liter of ideal gas is allowed to freely expand into a 2 liter volume in an isolated system the energy in the system would remain the same, the temperature in the system...
View ArticleWhy would Newton's 2nd law be meaningless here?
If an isolated body starts to accelerate, why would saying the system isn't properly isolated render Newton's second law meaningless? pg. 60 of K&K:...
View ArticleBreaking Magnetic Field Lines
When people talk about sunspots and the solar cycle and stuff like that, they often mention magnetic field lines poking through the surface of the sun. I'm pretty sure I get why the magnetic field...
View ArticleAir Resistance solution (is it valid)?
Last semester I did a project for grade 12 physics where I had to account for air resistance in projectile motion. I just wanted to post my solution here and as I never found out the merit of the...
View ArticleUniform Circular Motion of Swinging Objects
I am very confused with a particular aspect of part of my physics curriculum. Let's say there is an object swinging on a rope swinging in a circular motion. The mass of the object, length of rope, and...
View ArticleAtoms Releasing Photons
I was wondering, after discovering that in particular scenarios atoms can release photons, how they do it? Is some of the energy stored in the nucleus converted into light energy, or is it something...
View ArticleI want to build a particle accelerator
Hi, I'm 15 and I want to build a particle accelerator (probably in my backyard). I don't know much about physics yet, but I'm learning. I realize that this is a long-term project (my estimate is about...
View ArticleWhich coordinate is cyclic in this case
Consider a simple two particle system with two point masses of mass m at x1 and x2 with a potential energy relative to each other which depends on the difference in their coordinates V = V(x1-x2) The...
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If the solenoid covers the whole length of a shake flashlight, will it light up?
In a Faraday flashlight, a magnet is shaken to and fro in a solenoid to induce an EMF and thus current. Something like this: If the solenoid were to cover the entire length of the interior, and thus...
View ArticleMagnetic Field of a rotating point charge
Not sure if this should be in quantum section, please move if necessary. We know that: 1. A stationary particle with charge q is not affected by an external magnetic field. We can assume this particle...
View ArticleHow object distance varies with distance(depth)?
Suppose a rod measures 10 cm in length at a distance of 50 cm from my eyes, what will it's length be when it is pushed further by x cm ?(that is at a distance of 'x+50'cm from my eyes) Please provide a...
View ArticleIs Electricity Generated when a Magnet Falls Through a Copper Pipe?
The title is pretty self-explanatory. I know the speed of the falling magnet is much slower in a copper pipe, but since the magnetic field moves, is there still some electricity generated in the...
View ArticleHow to define the Hamiltonian phase space for system?
Title says it all, confused as to how I'm supposed to define the phase space of a system, in my lecture notes I have the phase space as {(q, p) ϵ ℝ2} for a 1 dimensional free particle but then for a...
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