?

Log in

No account? Create an account

[icon] Speed of Sound - Meme-Free Zone
View:Recent Entries.
View:Archive.
View:Friends.
View:Profile.
View:Website (Forgotten Futures).

Security:
Subject:Speed of Sound
Time:05:47 pm
Just experiencing an interesting demo of the speed of sound in air and through the ground - they're pile-driving supports for the new Crossrail power line support gantries this afternoon, about sixty or seventy yards from my house, I'm hearing the sound first followed by some vibration through the ground and my house a fraction of a second later.

Also posted at https://ffutures.dreamwidth.org/2098338.html, where there are comment count unavailable comments. Please comment here or there using OpenID.
comments: Leave a comment Previous Entry Share Next Entry

[icon] Speed of Sound - Meme-Free Zone
View:Recent Entries.
View:Archive.
View:Friends.
View:Profile.
View:Website (Forgotten Futures).