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Sound facts

Selected as the most interesting among United Kingdom related questions in
United Kingdom quiz
Which reptiles roar?
Crocodiles have vocal cords in the larynx and are the only reptiles able to produce guttural roars.
 globalquiz.org
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6
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reptiles facts
This strange object was built on the coast of Great Britain. What is it?
Acoustic mirror. Prior to World War II and the invention of radar, acoustic mirrors were built as early warning devices around the coasts of Great Britain, with the aim of detecting airborne invasions. The development of radar put an end to further experimentation with the technique.
 globalquiz.org
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5
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World War I facts
What is this "Cacophony"?
A harsh discordant mixture of sounds. A cacophony is a mishmash of unpleasant sounds, often at loud volume. A cacophony is a jarring, discordant mix of sounds that have no business being played together.
 Horin
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www.dictionary.com
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music facts
How far away did the lightning strike if it took 3 seconds to hear the thunder?
Approx. 1 km. Sound travels through air at 331.2 meters per second, so after 3 seconds it would travel approximately 1 kilometer.
 Ninjai
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wikipedia → Speed of sound
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weather facts
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