Recent content by SongDog

How thorough do you wish to be? If you seek to predict the acoustics you will need to look at the air plenum as a damped resonant dynamic system, driven by an impeller that has angular momentum, elastically coupled to a motor and idler that also have angular momentum. The design of the...

That’s the difference between advertising and science, right there. Anyhow, not to put too fine a point on the whole business, both fewer than and less than are Boolean valued operators which any sensible language design should both be applicable to floats, into, scalars, or cardinals...

Well, there's always Project Orion, but we can forget about using it near Earth.

Odd that nobody asked what type of modem/router the OP was using. If, like most, it provides port(s) for wired LAN connection, the simple solution is to connect your own modern WiFi router there. You are then free to configure it whatever way you wish, irrespective of the ISP’s arbitrary bad...

Trying or not, if you have an alternating surface current you will transmit EM waves. It is inescapable when any charge undergoes acceleration (at least in classical EM theory). To calculate a capacitance you must specify the two conductive objects involved and the dielectric between them.

Please don’t presume everyone here is male, gentile, or anything else.

Or as low as zero. With sufficiently high gain, a pulse can be created in a single pass through the gain channel: no mirror required. Of course that pulse is not tunable, highly directional, nor long duration, but it is possible.

Influenzas circulate and mutate in many wild and domesticated specie, not just humans. As a result, new variants arise frequently in swine, birds, even camels. AFAIK, we don’t yet see a similar behaviour for coronaviruses.

It will if you do it right. Capacitance can be measured to exquisite sensitivity by counting individual electrons with a SQUID (vide Rod Harris-Lowe).

Well, there's only one observer, the terrestrial one. In the observed frame, the distant Starshot sample should age slower. Consider a simple binary message: If life is detected, measure the first half of memory. Otherwise measure the second half. In the terrestrial wafer, does the remote...

[Mentors' note: This thread was split from https://www.physicsforums.com/threads/can-we-carbon-date-a-gas.981218/] Empirical test: If one wished to implement a controlled experiment of this sort, start with separating stocks of pure C12 and pure C14 with a mass spectrometer. Use the C12 to...

"Is there an upper bound on the amount of sustainable energy/unit time that could ever be made useful to mankind?" That depends. Are you assuming it must be used on Earth? If so, we can start by considering how much sunlight intersects our disc. Earth has a polar circumference of about 4E7...

Have a look at https://en.wikipedia.org/wiki/GPS_signals and you'll see that rapid signal acquisition depends on having the receiver's clock within approx. 1.023 microsecond of the clock used for the received signal. A 32ns/day drift, over a month, would exceed that. Equivalently, so would an...

The process described by @Mark Harder is now done automagically in modern water conditioners. Once a month or so you dump a 20kg or 40kg sack of conditioner salt into a holding tank, and software does the rest. When brine is needed, water fills the holding tank long enough to saturate with NaCl...

@CWatters, you might want to re-read that Wikipedia entry more closely.