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emmasim [6.3K]
3 years ago
10

I NEEEEEEEEEEEEEEEEDDDDDDDDDDDDDD HELLLPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP RE

Physics
1 answer:
dexar [7]3 years ago
5 0

Answer:

the appearance of shadows changing throughout the day

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Explained

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How far must you be from a 110 W speaker to have an intensity of 0.0439 W/m^2? (Treat the speaker as a point source.)
Lina20 [59]

Answer:

d=14.12m

Explanation:

Assume a point sound source that emits a sound power<em> P </em>(in W) evenly in all directions of space. Let us also assume that the medium does not absorb this sound power when it passes through it. At a distance<em> d </em>from the source this power will have been evenly distributed over the surface of a sphere of radius <em>d</em>. Therefore, the acoustic intensity I at distance d will be worth:

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This is the expression of the so-called<em> law of the square of distance: "the intensity is inversely proportional to the square of the distance to the source (considered punctual)".</em>

So

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d=\sqrt{{199.39}

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3 0
3 years ago
Determine the weight of a 1350 kg rock as it falls off a cliff.
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What is described by the terms body-centered cubic and face-centered cubic?
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4 years ago
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