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# every day is a school day on B3ta
did you know that margarine is grey, and that they dye it yellow to appear more like butter.
(, Mon 12 Mar 2007, 19:21, archived)
# Yes I did:P
Did you know that the speed of sound varies according to temperature?

It's 343 Metres Per Second at 20c:P

Making a 1kHz sine wave at 3.43 metres high.
(, Mon 12 Mar 2007, 19:23, archived)
# ^^this is news to me^^
i bet kris akabusi could still out run it
(, Mon 12 Mar 2007, 19:26, archived)
# does it not also vary due to propagation medium?
innit
(, Mon 12 Mar 2007, 19:33, archived)
# Nope
(, Mon 12 Mar 2007, 19:38, archived)
# Yes it does.
Hence a standing wave in helium is higher frequency.
*skulks*
(, Mon 12 Mar 2007, 20:00, archived)