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kiruha [24]
3 years ago
10

You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the s

ound? It reduces to a. one-fourth its original value. b. one-eighth its original value. c. one-sixteenth its original value. d. none of the above
Physics
1 answer:
34kurt3 years ago
8 0

Answer:

a. one-fourth its original value.

Explanation:

Sound is threated as a spherical wave. The intensity of the sound is inversely proportional to the area of ​​the wavefront (4\pi r^2). Therefore, it is inversely proportional to the square of the distance (r) to the sound source. So, if you double your distance, the intensity of the sound reduces to one-fourth its original value.

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10. Find the mass density of a ball with 22.0 g and a radius of 0.875 cm.
Ede4ka [16]

Answer:

Mass (m) = 22.0 g

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Density (d) = ?

First find ( volume) ;

v =  \frac{4}{3} \pi \:  {r}^{3}  \\  \\ v =  \frac{4}{3}  \times 3.14 \times ( {0.875)}^{3}  \\  \\ v =  \frac{4}{3}   \times 3.14 \times 0.66992187  \:  {cm}^{3} \\  \\ v = 2.8 \:  {cm}^{3}

Density =  \frac{mass}{volume}  \\  \\ d =  \frac{m}{v}  \\  \\ d =  \frac{22}{2.8}  \\  \\ d = 7.857 \:  \frac{g}{ {cm}^{3} }

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7 0
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Last week we investigated the black hole at the center of our galaxy, with massMX= 8.5×1036kg. An object whose size is on the or
swat32

Answer:

d=2.38*10^{13}m

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Answer:

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Answer:

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