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kifflom [539]
3 years ago
7

If you were trying to build a sound proof room, which of the following materials would you choose in order to absorb the most so

und, based on the coefficient of absorption for each material
Physics
1 answer:
LuckyWell [14K]3 years ago
7 0
The sound absorption for wood is greater than the sound absorption coeffiecient for concrete at most frequencies, hence based on the coefficient of absorption for each material, wood is the best choice.


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The velocity of the ferry relative to the current is 4.5 m/s.

<h3>Relative velocity</h3>
  • Relative velocity is the velocity of a body as observed from the reference point of another body either stationary or in motion.

Since the river is flowing parallel to the shore and the ferry is moving perpendicular to the shore, their velocities are at right angles to each other.

The two velocities form a right angled-triangle of sides 2, 4 and a hypotenuse which gives the relative velocity of the ferry to the current.

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Learn more about relative velocity and Pythagoras rule at: brainly.com/question/25617868

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