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1d
comment What's the difference between $10\%$ of $10\text{ cm}$ and $1\text{ cm}$?
One is relative, the other absolute.
2d
reviewed Approve suggested edit on Lie algebra and Lie group about quantum harmonic oscillator
2d
reviewed Reject suggested edit on Deduce magnetic field based on electric field
Apr
12
reviewed Approve suggested edit on Question on kinematics
Apr
8
comment Could water physically makeup the core of a planet or otherwise large celestial mass?
@irth Read carefully, there is not litterally an ocean under water.
Apr
8
comment Could water physically makeup the core of a planet or otherwise large celestial mass?
nature.com/nature/journal/v507/n7491/full/507174a.html
Apr
6
answered Orbital motion with varying radius
Apr
6
revised Order of magnitude
added 10 characters in body; edited tags
Apr
4
comment Does car have more kinetic energy when turning?
Basically: "You are counting double"
Apr
4
reviewed Reject suggested edit on Discord for partially decohered bell state
Apr
4
comment The scissor paradox: can we pass the information faster than light?
Your assumption that the scissors are not bending can not be right. If the width is smaller, it is even easier to bend, as far as my understanding goes.
Apr
4
comment Can a submerged capsized vessel be turned into a sort of diving bell and propelled forward like a submarine?
I suppose such a situation might exist, but it seems unlikely to me that such a situation can be obtained by capsizing.
Apr
4
revised Local tension and pressure measurements
removed wrong tag, added another one
Apr
4
comment Heat transfer and temperature difference of 2 liquids
@John If you are giving equations, it is more intuitive to write it as $exp(-t/\tau)$, with $\tau$ a timescale, which is a kind of thermal relaxation time.
Apr
3
reviewed Approve suggested edit on What is charge actually? How to define it?
Apr
3
answered Heat transfer and temperature difference of 2 liquids
Apr
1
reviewed Reject suggested edit on How stupid is this theory of gravity?
Apr
1
comment Faster than critical damping for harmonic oscillator?
Not me, but I can imagine that it makes a difference.
Apr
1
comment Faster than critical damping for harmonic oscillator?
Nice explanation, but it doesn't completely address the question, i.e., what if the damping is non-linear?
Mar
30
comment How fast would a truck have to go to pull a pedestrian onto the road?
@user6972 And how slippery the sidewalk is.