Jan
21
revised Differences between the gravitational constants $G$ and $g$?
Changed the way the units were written for $g$. This reason I did this is because when it is written as $\frac{m}{s^2}$ I initially thought the $m$ here corresponded to 'mass' (not metres), given that $m$ in all other contexts here is mass. This way of writing it is more concise and less confusing.
Jan
20
revised Can the vacuum be filled with virtual micro-black holes?
edited body
Jan
20
reviewed Approve suggested edit on What force particle mediates electric fields and magnetic fields?
Jan
12
comment Does the Relativity Principle of Special Relativity imply homogeneity and isotropy of all the reference frames?
@Muphrid isotropy of spacetime is not the isotropy used in GR discussions. Isotropy used in GR is that of the 3d hypersurface which is analogous to the constant time snapshot of the universe in newtonian approaches. This is well defined in all the texts of GR, including Gravitation referenced above.
Jan
12
revised Does the Relativity Principle of Special Relativity imply homogeneity and isotropy of all the reference frames?
updated
Jan
12
answered Does the Relativity Principle of Special Relativity imply homogeneity and isotropy of all the reference frames?
Jan
12
comment Why do we calculate energy by integrate the Signal squared?
Basically we are showing that power and energy are proportional to a conserved current which is measure the flow of conserved quantity (charge) over time. Another way to conceptualize it is to think in terms of accounting. If I have a budget and I use a double entry accounting process, debits and credits should sum to zero. So money in this system is the conserved charge. It flows through different accounts over time. Some things I use my money for give me greater marginal utility, analogous to voltage, making Utility analogous to power.
Jan
12
comment Why do we calculate energy by integrate the Signal squared?
Voltage is potential, current is the flow of charge. Power is simply energy per unit time. Charges are generators of a continuous symmetry via Noether's theorem and exist whenever there is a conserved current, e.g. the derivatives of the current in any direction sum to zero. P=VI is a statement about the proportionality of current to power. Although voltage can take a constant value, it can also vary as a function independent of the current. cont below.
Jan
12
reviewed Approve suggested edit on How is a standard unit divided into equally smaller or fractional units physically/experimentally?
Jan
12
reviewed Approve suggested edit on Magnetic field exclusion and retention in superconductors
Jan
12
revised Why do we calculate energy by integrate the Signal squared?
added 115 characters in body
Jan
12
answered Why do we calculate energy by integrate the Signal squared?
Jan
12
revised Can the vacuum be filled with virtual micro-black holes?
added operator symbols
Jan
12
comment Can the vacuum be filled with virtual micro-black holes?
@Slereah If you are talking about virtual particles you are talking QFT.
Jan
12
answered Can the vacuum be filled with virtual micro-black holes?
Jan
12
awarded  Custodian
Jan
12
revised Quantum Entanglement - What's the big deal?
added 1 characters in body
Aug
27
comment What does it mean that the universe is “infinite”?
@DavidZ I would caveat your answer heavily on the FLRW model is a complete and accurate model for the universe. The vacuum is sufficiently unstable (as far as we can tell) as to warrant an arbitrary cutoff.
Aug
21
awarded  Yearling
Mar
15
answered What is the path integral exactly?