# Tag Archives: energy

## Calculate forces on atoms from potential energy of system and position of atoms

Background

I am using a neural network to calculate the potential energy of atoms in a configuration and then adding energy of all atoms to compare it with the true energy of the configuration(label) to update the weights.

## Kinetic Energy Term in Tight Binding Model of a System Couple to Electromagnetic Field

In the one particle system with electromagnetic field, the Hamiltonian is modified to be

$$H=\frac{1}{2m}\left(\mathbf{p} – \frac{e}{c}\mathbf{A}\right)^2+V(\mathbf{r})$$

However, if we consider the tight binding model in w…

## GMSK/GFSK BER simulation in GNU Radio : How to specify signal energy

In GNU Radio, BER vs SNR can be measured by fixing the signal energy and varying the amplitude of the noise source block. For example, in BPSK, we have transmitted signal $s\left(t\right)$ with a given bit energy $E_{s}$ and …

## Solar energy MPPT device with precise 12v out

Is there an MPPT device which outputs exactly 12v DC? Most of my searches led me to 12v chargers, which output a (10% to %20 initially) higher voltage that is optimal for charging the battery type it’s designed for.

In my ca…

## How to develop energy , rapture , tranquility and immersion?

I am looking forward to develop 7 factors of enlightenment. The 7 factors of enlightenment are factors of mindfulness, investigation of principles, energy(viriya), rapture(piti), tranquility(passaddi), immersion(samadhi), and…

## Why does ethane release more energy than ethyne when burned?

My book explains that since ethane contains a single bond, ethene contains a double bond, and ethyne contains a triple bond, and that when burned ethane releases the most energy because “the fact that the lowest energy is rel…

## Where does the excitation energy of Carbon come from in CH4 formation?

When CH4 formation takes place, we need 4 electrons in the valence shell. Carbon’s 1e from 2s is excited to 2p orbital. Where does that energy come from? My teacher says it comes from orbital overlap (hybridisation) but hybri…

## If I use a magnet to levitate another magnet, where is the energy coming from?

Imagine I use one static magnet to levitate another magnet indefinitely.
This levitating magnet is in a narrow tube that wont allow it to rotate and get attracted. So it will keep levitating forever, right?

Since gravity use…

## Would a very cheap renewable energy source be harmful economically?

This question is not on whether these devices work or not but so much as if they did work. What if electricity can be made so cheap that everyone could afford it ti the point there was no demand for electricity? Would a new c…

## Energy transfer through atoms collisions

When a collision between atoms occur like in heat conduction between two gases, does the energy transferred cause an electron to move to a higher energy excitation state, or does it just increase the kinetic energy of the ato…