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visits member for 1 year, 6 months
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Mar
8
answered Change in focal length of lens inside water
Mar
8
revised Conduction and propagation
Formatting
Feb
21
comment is an electron gun dangerous?
I'm worried about your last sentence. I enjoy placing my body in front of a nuclear fusion reactor and absorbing the visible and invisible electromagnetic radiation it emits, Should I stop?
Jan
20
comment Synchronizing time between two points
On a practical note: see NTP which can synchronise clocks thousands of kilometers apart to accuracies of a few milliseconds. I believe it is the jitter and not the latency which limits this.
Jan
7
comment Why are turns banked?
ǝɔɹoɟ ʃɐʇǝdıɹʇuǝɔ ǝpıʌoɹd oʇ pǝpuǝʇuı sı ʇʃıʇ ǝɥʇ 'ǝʌıʇɔǝdsɹǝd ʎɯ ɯoɹɟ
Jan
7
comment Does the Earth rotate vertically too?
Is the Earth a Tippe top? (˙ou :ɹǝʍsuɐ)
Jan
6
comment Spontaneous motion in a wind tunnel
Wind-powered boats can indeed sail into the wind but this isn't a useful answer to the question.
Dec
27
revised Is a real life electric shield possible?
added 260 characters in body
Dec
27
answered Is a real life electric shield possible?
Dec
26
comment Is a billion volt electrical transmission line possible?
This answer appears to assume that the transmission line is designed identically to an existing 800 kV line. It does not seem to consider possible design changes for higher voltages.
Dec
26
comment What happens when molten metal cools within a strong magnetic field?
It eventually solidifies. ;-)
Dec
26
comment Is it possible to focus the sun in such way?
@Chris: Thanks, I've edited your comment in with attribution, I hope that's OK. If not, please make any edits/tweaks (or suggestions) you see fit.
Dec
26
revised Is it possible to focus the sun in such way?
Include Chris White's comment re Schmidt-Cassegrain design.
Dec
25
answered Is it possible to focus the sun in such way?
Dec
18
comment Pressure difference between 2 side of wings of aircraft
How Airplane wings really work - Professor Holger Babinsky, Cambridge University.
Dec
13
comment What cosmic event would cause Sun rising from the west?
@fibonatic: interesting point but the interfaces between crust, mantle, liquid and solid cores are not entirely frictionless. The crust is obviously thin and light (relatively) so my answer ought to take your observation into account.
Dec
13
revised What cosmic event would cause Sun rising from the west?
Noticed that the exponents were improperly formatted
Nov
19
comment Why are high voltage lines “high voltage?”
@Jesus: The crest/trough and nodes are time-dependent, not position-dependent. Apart from that you are correct.
Nov
18
answered Why are high voltage lines “high voltage?”
Oct
17
comment Why does dust stick so well to fan blades?
The elemental composition and sources of house dust and street dust