Recent content by maheshshenoy

Indeed, but we are talking about how can we think about sound wave in an ideal gas (which apparently have no force of attraction). So I was just using collision as a way of explaining the propagation of longitudinal waves :)

True.. however, we do that just to simplify things, and also usually its mentioned, that even though in reality there are collisions of molecules with EACH OTHER, the final result (connecting the pressure, volume and the moles and rms speed) remains the same. So we only avoid the collision of...

But I checked in most sites, that mention the motion of sound waves in ideal gas. For example in wiki http://en.wikipedia.org/wiki/Speed_of_sound#Compression_and_shear_waves it mentions a line saying the "speed of sound in an ideal gas is independent of the frequency" So I guess, in ideal...

I like to think of it this way FORCE = how much strength you have.. if someone asks you "can you lift a 50kg object off the floor?", you think about "how much force i need to exert, or do i have enough strength in me to lift it" .. if you don't have the required strength to put the sufficient...

this is wrong.. q = (Im/ω)*sinωt.. You are integrating. remember not differentiating. So this becomes Vm = Im*1/ωC compare this to V = IR so 1/ωC plays the role of impeding the AC.

Absolutely... and if you want to think of this in terms of energy, its called "Electrostatic potential energy" Someone must have done work to bring those two charges in that position.. and the work did by that "someone" got stored up as the potential energy.

@Aichuk When u rub the balloon, u are creating a charge imbalance (if u rub balloon to your hair, i think the balloon gains electrons from your hair and becomes negatively charged .. but it doesn't really matter if it gains or loses, what matters is.. this creates a charge imbalance).. and its...

This looks very interesting.. just take a look.. maybe what u have been thikning about Its a combination of a lot of harmonics together..

Hello Javiatrix "My first post too :D" I wouldn't say momentum is just a cooked up "currency" to work with physics.. I think of momentum as something that defines how much "motion" an object has. Because, when objects bang into each other, collide, break apart, plough, or even explode, the...

So what I finally understand is.. elasticity is not something we can quantify.. so its not a physical quantity right?

Yes.. and we still say steel is more elastic compared to those elastomers.. so basically elasticity is not just a measure of how much recoverable strain its can exhibit right?.. So that's what i wanted to know exactly when we say something is elastic.. what do we mean.. it must have high yield...

So you mean to say.. we don't have to really define which is more elastic ? its not relevant in the real world application?

Well.. i got that.. but how do find which is more ELASTIC?

This is a sample curve

Hello .. I have problem understanding how to decide which material is more elastic based on stress strain curve.. my understanding is as follows 1)if a material has big youngs modulus.. then it is more stiff 2)a material with a big youngs modulus may be or may not be very elastic (elasticity...