This is physics, need help with qn 3 thanks

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secondary 3 | E Maths
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secondary 3 E Maths Singapore

This is physics, need help with qn 3 thanks

Date Posted: 3 years ago

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Whenever there's a 2nd sound, consider the possibilities of a second echo or a non-echo (direct from source). Hope this helps

Date Posted: 3 years ago