They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the roomshould be 17.2 m. Obviously,in asmall room echoes cannot beheard.
Answer:
3 hours
Explanation:
180 divided by 60 (mph means miles per hours by the way)
Answer:
the correct representation of the trough is b
True because the atmosphere is in the way
<span>its reflection of light from a glass surface
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