All Questions
Tagged with potential-energy energy
69
questions
0
votes
1
answer
148
views
We create systems with different values of Energy? [closed]
I understand that Energy is a conserved quantity in a system.
A number, that's always the same to the system. However, don't we determine such a number?
I mean, we can create systems(Or study them ...
- 677
0
votes
2
answers
848
views
Are black holes an infinite source of energy? [duplicate]
Black holes are considered particularities because in a determined point in time they are pointless, as consequence there are some mass in a null space so the density become infinite. Finally if ...
- 775
0
votes
2
answers
438
views
Distribution of interaction energy in electrostatic systems
If we have two electrostatic systems their interaction energy is given by
$$U=\epsilon_0\int\vec E_1\cdot\vec E_2dV\equiv\int\rho_1\phi_2dV\equiv\int\rho_2\phi_1dV$$ Here the integral is over the ...
0
votes
3
answers
839
views
Net Force on System Not Equal Zero, but GPE increases and no change in Kinetic Energy
I am confused about changes in gravitational potential energy, net external force, and work-energy theorem.
For a single particle system, I understand that a net external force results in a change in ...
0
votes
2
answers
619
views
Does potential energy get transferred from my body to a wall when I push a wall and fail to move it?
When I push a rock (and fail to move it), I do not do any work and therefore there should be no energy transfer.
But my teacher says that, when one pushes a rock, energy is transferred to the rock ...
- 1,033
0
votes
1
answer
561
views
Doesn't the "Mexican hat" potential give a misleading impression that the barrier height between two vacua is finite?
For $\mathbb{Z}_2$ symmetry breaking in a Classical Field Theory described by a potential $$V(\phi)=\lambda(\phi^2-v^2)^2,\tag{1}$$ there is a finite energy barrier of height $\epsilon=\lambda v^4$ ...
- 26.8k
0
votes
1
answer
67
views
Is it, in general, better to speak of potential energy density or of energy density? [closed]
I read in this article:
Antimatter
And here we are: at the very end of the feasibility spectrum into the fantastic. Antimatter is made of antiparticles, which have the same mass as particles ...
0
votes
3
answers
152
views
If a system is placed in a gravitational field, can you define internal energy for it?
My textbook says that internal energy for a system can only be defined if the system is isolated i.e. it has no external $K.E.$ and is not present in any external force field. But why? Why is it ...
- 837
-3
votes
1
answer
84
views
Why Doesn't the Amount of Work Determine the Elastic Potential Energy in Springs and Gravitational Potential Energy? [closed]
Why isn't the amount of work done on the spring the determining factor for the amount of elastic potential energy stored in a spring?
I learned that the change in potential energy is a result of the ...
- 53