Cambridge IGCSE Physics practice
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At a glance
MCQ
Type
cambridge_mcq
Style
Topic
Sound
Exam-style question
What is the speed of sound in air at room temperature?.
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Flashcard 1 of 6
Question 1 of 5
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Description
An echo is produced when sound waves reflect off a surface and return to the listener. The time it takes for the echo to return can be used to determine the distance to the reflecting surface.
State the definition of an echo.
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