My 1st question is : why don't you hear echoes in a forest ? ?
my 2nd question is : in which material would sound waves probably travel the fastest? a. cotton b. milk c. iron d. oxygen

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Opinion polls reveal that many people believe that the military buildup of the 1980s came at the expense of pressing domestic problems such as environmental pollution and deteriorating educational and transportation infrastructure. in short, people are becoming aware of

Transcendentalist walt whitman captured the spirit of young america by creating