I've always heard that maxwell's equations contains essentially all of eletromagnetic theory. However, there's one thing I'm having trouble doing for myself: deriving the magnestatics equations from the maxwell's equations. Of course: it's clear that if you put ∂[t]E=∂[t]B=0 (partial derivative...
I may be wrong, but the work that you do independs on the reference frame picked, and the non-inertial reference frame is much easier in that case. To the response above, I meant that the force that you need to balance out the coriollis effect on the weights would cause a reaction from the...
This (photo) is a very typical example of conservation of angular momentum, but my trouble arrises from trying to prove that the difference of energy will have to correspond to work, by calculating the work done by you to alter the moment of inertia. I have spent a lot of time in this, but I...
When dealing with heat transfer, there are cases where Q can be expressed by C*ΔT, for some proportionality constant C. However, in isothermal processes for example, this formula would lead to a mistake, for any value of C (because it would imply Q=0, which is not true generally speaking). What...
Supose we have a ¨U-shaped" metal bar, stuck in the ground, and I aply a force on the top of the part on the right, trying to make it wider. If I were to avaliate the forces acting on a specific part of the bar that includes the point that I´m applying the force, let`s say the portion from that...
Hello there, this is a fact that I can't understand thinking about it... Energy has to be given so that the inter molecular bonds can be broken, and energy goes in when there are formed (even though that sounds very counter intuitive to me), but why is the energy all distributed to potential...
Thank you, but the reason for the question is that I don`t understand why there is a release of energy when intermolecular bonds are made (why we need to cool a liquid for it to solidificate). There is a need for cooling because the molecules have to be closer together and with low energy so...
I believe I can explain why there is energy needed to break intermoleculares bonds and getting into a gas or liquid, but the other way around confuses me. Bonds have potential energy associated to it, so It's needed work to break the bonds, because we would be trying to move a molecule away from...
Thank you very much for the fast response. However, when thinking about heat as chaotic motion of molecules, I get confused. How does an exothermic reaction or a combustion causes that kind of motion? And why does a more caotic motion of molecules causes an endothermic reaction to happen?
Using a more physics oriented approach, rather than a chemistry one, and looking to an energy point of view if possible. For example, why when ice turns into water there is a need for energy (heat)? I know in some extent that the energy is used into re-organizing the chemical bonds, but that...
If you are talking of the velocity of a punch, yes it does contribute to force. See, a misunderstandment of Newton's second law is that in F=Ma, the a stands for the acceleration of the one who did the force just before the impact. That would mean that if a truck is about to run you over but it...
You are using the wrong dimensions for acceleration, insted of m/s, acceleration is measured by m/s^2. An acceleration is a rate of change of velocity, in relation to time. In some time to there is a velocity vo, and for a time later on t1 there is a velocity v1. The average acceleration of an...