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hammer [34]
3 years ago
5

Sometimes you are able to hear your echo in rooms due to the acoustics of the structure. If you call

Physics
1 answer:
malfutka [58]3 years ago
8 0

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.

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A student's life was saved in an automobile accident because an airbag expanded in front of his head. If the car had not been eq
dexar [7]

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Compared to windshield the airbag exerts much lesser force  

Explanation:

Impulse is defined as change in momentum of the object when it is acted upon by a force during interval of time

<em>Impulse = Impulsive force *time</em>

I = F*Δt

If the object should be bought to rest from certain velocity there should be change in momentum. If the duration in which the momentum is increased then there would be less force applied and hence less damage.

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The change is momentum will be the same with or without momentum but its the time that decides the impact of force.By making it longer the force become less.

<em>Thus compared to the windshield the airbag exerts much lesser force.</em>

<em>   </em>

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<em><u>i</u></em><em><u> </u></em><em><u>hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

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What is the relationship between the type of energy sublevels present and the
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