Answer: Plz mark me brainliest i am 12 and i've never been marked brainliest.
Explanation:
Sound will echo in an empty room because if there is nothing to stop the sound from reflecting between hard surfaces, such as the walls, windows, ceiling, and floor . Since each surface is not a perfect reflector, some of the sound energy will be absorbed by the surface.
First one, insulator. Second one, conductor.
Answer:
5.6ft
Explanation:
on avgerage a male gets 5 foot 6 inches
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Gravity is pushing you down on the earth while the friction from the ground is pushing you up. Those are the two frictions you must overcome when walking.
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Search each one of them up on GOOGLE it’s easier trust me
