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The most difficult sound riddles

A list of sound related questions that are most often answered incorrectly
United Kingdom quiz
How far away did the lightning strike if it took 3 seconds to hear the thunder?
approx. 0.3 km
approx. 1 km
approx. 3 km
approx. 9 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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0
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wikipedia → Speed of sound
0
Very interesting!
weather riddles
Which reptiles roar?
lizards
crocodiles
turtles
none
Crocodiles have vocal cords in the larynx and are the only reptiles able to produce guttural roars.
 globalquiz.org
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0
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6
Very interesting!
reptiles riddles
This strange object was built on the coast of Great Britain. What is it?
sun clock
storm detector
acoustic mirror
emergency radio receiver
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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0
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5
Very interesting!
World War I riddles
What is this "Cacophony"?
a harsh discordant mixture of sounds
a coherent mixture of sounds
gibberish, incomprehensible speech, chatter
no sense of music
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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0
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www.dictionary.com
4
Very interesting!
music riddles
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United Kingdom quiz