# Recent content by gomunkul51

1. ### Heat exchanger for a layman

OK, I'm familiar with that pressure problem. A very simple solution (use to have that in my military base) is when you have two different pressures in the hot and cold taps (but above atmosphere): you get two pipes (hot and cold) with each having it's own separate controllable valve and connect...
2. ### Heat and Thermal Energy

In classical thermodynamics the state function is the Internal Energy which is modulated by Work done "to" and "by" as well as Heat, transferred "to" and "from". Not all Internal Energy is Thermal Energy (i.e. is not proportional to temperature) e.g. the Energy that is stored in chemical bonds...
3. ### Heat exchanger for a layman

What do you think about installing a water tap with two lines (two in - one out): hot and cold? It would dilute the hot water with cold water to a comfortable temp. Cheers. Roman.
4. ### Heat and Thermal Energy

You should understand that any net (macroscopic) Heat or Thermal Energy transfer is from "Hot" to "Cold" (the so called parcel receives radiation energy but it also radiates it away as a function on its temperature). So I claim there is no difference in your definition of Heat and Thermal...

In the annihilation of particles charge is conserved and as far as I know Electromagnetic radiation is still created by Charge (electrons and/or quarks). In a black EM radiation is, as far as I know, created by Charges and escapes the event horizon due to virtual charged particle annihilation...
6. ### Two scenarios different energy requirement?

Change in Work = Change in Potential Energy + Change in Kinetic Energy *Total distance traveled is not important as there are no fricative (tangential) forces. Cheers. Roman.
7. ### Rainfall drop velocity from a given height (not terminal!)

As I see it you need to write it in the from of a differential equation and Matlab will solve it (numericaly or otherwise): Sum( Force( V(t) ) ) = mV'(t) i.e. the sum of all the forces acting on the drop (drag ect.) - you need to write the those forces as a function of the drops velocity...
8. ### Escape probability of a particle in a sphere

Look up Brownian Motion. Cheers. Roman.
9. ### Microcantilever, different resonance modes

Do you have theoretical knowledge in how to describe any of those motions that create the resonances? Write the equations and look what is dependent of what. Cheers. Roman.
10. ### Amplitude and energy relation in optics

From what I remember the transmition coefficient is defined as the ration of the intensity that is being transmitted to the total intensity and intensity is proportional to the electric field squared. Intensity is proportional to em energy. Does it make sense? Cheers. Roman.

Basically charges affects other charge solely via EMF (photons). Roman.
12. ### Wave speed as a function of compression?

Is the beam made out off two parts of which one is under tension and the other under compression? Or what is being compressed by what? Roman.
13. ### Heat exchanger for a layman

Welcome to the forum! This is more of a educational forum you might have better luck on an Engineering forum. If the heat exchange is home made it's very hard to predict the outcome, the bottom line is that you will have to test your setup. Good luck ! Roman.
14. ### Two scenarios different energy requirement?

All the energy you put in pushing the car up the hill will not be lost. At the end destination the car rolling of the hills will move at a greater velocity thus will have greater kinetic energy than the car you didn't had to push so hard. It all could be written in vie the Work-Energy theorem...
15. ### Heat and Thermal Energy

In both cases it could be called Heat/Thermal energy transfer. In classical thermodynamics Energy can be transferred by two mechanisms: doing work and transferring heat (which is the transfer of Thermal energy). As far as I know Heat and Thermal energy are synonyms. *of course there might exist...