How is energy in the universe constant?
89301
Is the total energy of the universe constant?
80785
What is potential energy truly?
122561
Is the energy always discrete?
152415
Why "Dark Energy" is called energy instead of force?
107031
Is conservation of energy only for isolated systems?
150369
What does the decay constant mean?
38720
Is it possible to speak about changes in a physical constant which is not dimensionless?
155640
Why is the laboratory frame energy always greater than the center of mass frame energy?
119004
Proof of conservation of energy?
9207
How do gas molecules constantly bounce without losing energy?
2814
Energy conservation of Virtual Particles - Quantum Fluctuation?
117791
Why does the frequency of a wave remain constant?
148838
Is the total mass of the universe constant in time?
9463
What is the proof that the universal constants ($G$, $\hbar$, $\ldots$) are really constant in time and space?
63748
What does it mean that the universe is "infinite"?
107971
Hubble's law and conservation of energy
100972
Can someone explain Planck's constant simply?