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Jan
29
awarded  Popular Question
Jan
11
awarded  Yearling
Dec
28
reviewed Approve What is an Unbalanced Interferometer
Nov
26
reviewed Approve Why are turns banked?
Oct
2
reviewed Reject Would a magnet attract a paperclip indefinitely?
Sep
30
comment Calibration of a clock
@Lenzuola The speed of light is an obscure number to most people. By that criteria only the seconds counting methods and similarly works. I get the impression that you are slowly changing the premise of the question to be about methods that would work with YOUR particular skills and knowledge. If you would have said so from the beginning I might not have bothered to answer.
Sep
30
comment Calibration of a clock
@Lenzuola The speed of sound in air have a negligible pressure dependence. Composition does matter, but it is hard to imagine a radically different composition that is both hospitable to humans and likely to form in another planet. If you have good pitch you can control for different composition by comparing the played frequency to your calculated.
Sep
30
comment Calibration of a clock
@Lenzuola I agree that most people don't know the Young's modulus of any metals, but surely there are some people who use this kind of information regularly who have memorized some values. The speed of sound in air, on the other hand is much more common knowledge. As I wrote: the best method will be different for different people depending on their skills and knowledge. Surely, most people wouldn't be able to build a radio from scratch either.
Sep
29
answered Calibration of a clock
Sep
28
reviewed Approve Why is the potential energy of a dipole in an electric field zero when the dipole points perpendicularly to the field?
Sep
7
awarded  Enlightened
Sep
7
awarded  Nice Answer
Jun
10
reviewed Approve Find time-parametrization given path and speed of a particle
May
7
reviewed Approve North and south of magnetic field
May
4
answered What would we see back on Earth if we shot a camera off into space and watched a live-stream?
May
4
reviewed Approve Yield Strength versus Ultimate Strength
May
4
answered How does the number of electrons and protons determine the melting point and hardness of a solid?
May
4
reviewed Approve How does the speed of a DC motor depend on the size of the coil?
Apr
27
comment Can this RC boat work in thoery?
This most certainly will not work the way your friend thinks. Skip the tissue and direct the airflow in the direction opposite to your preferred travel direction and you might be able to accomplish a descent airboat.
Apr
27
reviewed Approve Is the flux through A the same as the flux through B?