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Dec
28
reviewed Approve Which information is “destroyed” when a qubit is read?
Dec
24
reviewed Approve How apply $\mathbf{F} = m\mathbf{a}$ to a whole pulley system?
Dec
24
reviewed Edit Conservation of momentum and mechanical energy in different reference frames
Dec
24
revised Conservation of momentum and mechanical energy in different reference frames
kg not Kg
Dec
22
comment Does steady flow imply laminar?
Ah, I see what you mean. In cases with a driving force (i.e. pipe flow), statistically stationary turbulent flow is real. I was not specifically referring to the initial phase, but rather trying to compare forever and "forever + 1 time unit"
Dec
22
comment Does steady flow imply laminar?
@Gert I don't get your point. "Turbulent flows can exist forever". I agree, but where do I say something else? I thought that was your interpretation of "transient" (i.e. non-eternal). I don't get what you mean with "normal time range" in "real application"? What I mean was, that averaging over $[t_1,t_2]$ and $[t_3,t_4]$, results in the same statistics. Can you maybe expand on your comment, so that I understand my confusion? I will then improve my answer.
Dec
22
revised Does steady flow imply laminar?
added 25 characters in body
Dec
22
comment Does steady flow imply laminar?
@Gert Transient means time-dependent.
Dec
21
comment Flipping a deck of cards: why do the cards cluster?
What surface are you trying this on?
Dec
21
answered Does steady flow imply laminar?
Dec
20
reviewed Reject How do I figure out the totally airborne height for a given machine?
Dec
13
comment Why water boiling time depends linearly on water volume?
No, that is not the same. You are comparing static with transient situations. The volume production term balances heat outflux for the animal. In the stove heat influx balances rate of temperature increase. This is a complete different situation
Dec
6
comment Why is the object's maximum speed at x=0 for spring?
How did you get to $v$ for the vertical spring?
Dec
6
comment Why does a continuous water stream form ripples when colliding with a surface?
Possible duplicate of Patterns in laminar flow of tap water
Nov
23
revised assumptions about sound waves
Minor typo's
Nov
10
reviewed Approve Does turning a spoon in water raise the temperature?
Nov
10
reviewed Approve How much of the Earth's atmosphere is visible from its surface
Nov
3
reviewed Reject Does friction depend on the direction of motion?
Nov
2
comment Navier-Stokes: equation or equations
Although this question is closed as off-topic, I think people are more than willing to discuss this on chat.
Nov
1
reviewed Edit Is Earth really a magnet?