Simple Harmonic Motion Equilibrium
I am a little confused with this subject. If you have a mass hanging from a spring, there is a specific equilibrium point, but what if you apply a force downwards on the mass, will this have an effect...
View ArticleClik here to view.
Why are ice cubes not really cubes, but trapezes?
In other words, why are ice cubes trays shaped like the left-hand figure instead of the right-hand one? If the cube were more square-shaped like the second figure, it would have more volume, thus...
View Articlei don't understand partition function
is the boltzmann factor the probability of a particular state of a system? can someone explain the partition function to me (qualitatively please!), we've been using it in class and i don't get it. we...
View ArticleDo you integrate a variable charge density when solving for Q?
For example, let's say there was an block infinitely long in the x and y direction and in the z direction bounded by positive and negative a. I am trying to find the charge of a imaginary partition...
View Articledistribution of energy
Hi, i´m reading Landau´s mechanics and in the 4th chapter in the part disintegration of particles (16) i can´t figure out the following thing. We have a function T=(1/2)m(V2)+(1/2)m(v02) + mVv0cos(θ) ,...
View ArticleNeed help qualitatively understanding the concept of a tangent bundle
Hello. In my textbook by Jose Saletan called Classical Dynamics: A Contemporary Approach the author talks about TQ, the domain of the Lagrangian. He states that the space tangent to a point on the...
View ArticleClik here to view.
Kinetic Theory of gases: pdf
Hi guys, I'm studying the Kinetic Theory of gases from Pauli's book Vol. 3. Here he describes a section on the Mean free path, where the probability of two particles with speed v and v' colliding is...
View ArticleRMS speed of an ideal gas
Hello everyone, When I was studying about the way to find the RMS speed of an ideal gas by using classical mechanics, I wondered that why the time interval of the collisions can be approached as the...
View ArticleFaraday's Law of Induction
Hi, please could someone help explain how magnetic flux works in Faraday's law as I struggle with electromagnetism. From what I understand, if you have a loop of wire in a magnetic field then you get...
View Articlepotential theory for water waves
hi :) http://ocw.mit.edu/courses/mechanica...7JF09_ch06.pdf In page 37 they use newton's 2nd law for a fluid element (while ignoring viscous forces) to derive the bernoulli equation for unsteady flow....
View ArticleMeasuring torque with scales?
Hi Folks: I'm pondering teaching torque and having students build mobiles as part of that. I started wondering if I could have them derive a torque equation. That started me wondering-if they were...
View ArticleClik here to view.
Heat Radiation in Thermodynamics
Hello, first of all, I must say that I am quite knowledge lacking in the thermodynamics topic, I am just seeking some intuitions. From what I have read so far, heat can only flow from hot bodies to...
View ArticleWhy do things rotate?
Just from the most basic concepts, is it due because of rigidity that when a force is applied to a non COM point that an object rotates? Why does the magnitude of rotation increase with increased...
View ArticleThermodynamics and heavy use of partial derivatives
Hello, I am not completely certain why in thermodynamics, it seems that everything is done as a partial derivative, and I am wondering why? My guess is because it seems like variables are always being...
View ArticleConversion of elastic energy to sound
Hi everyone, Can anyone please explain me the exact difference between the difference between two physical mechanisms (pls. explain in context of sound absorption) 1) PHONON- PHONON INTERACTION. 2)...
View ArticleNeed Equations for Ballistics!
Hello physics enthusiasts, I was hoping for some insight into ballistics. I've been playing some games (namely Planetside 2) with somewhat realistic bullet physics, and have been trying desperately to...
View ArticleWhat ensemble really is ?
What is ensemble? I've read about this in blundell's book, and It is said that it's used to control microscopic properties. I don't understand this statement. Somebody please help me ..
View ArticleHall effect
The idea behind the Hall effect is according to my book that the magnetic field induces a charge distribution such that there is more positive charge on one side and more negative on the other. This...
View ArticleDipole radiation
Hi, I an reading an interesting chapter of Feyman where he explains the basis of light-matter interaction with wave theory: http://cua.mit.edu/8.421_S08/Reading...refr_index.pdf I didn't understand...
View ArticleDulong Petit derivation.How do we get this formula?E=kT
Dulong Petit use energy,E=$k_B$T and the probability distribution as f(E)=1. Internal energy,u=3N$k_B$T $$C_v=∂u/∂T=3NkT$$ Three there because there is 3 modes in each atom. Then my question is why do...
View Article