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2 years ago

The intensity of sound waves is linearly proportional to ?

Physics

1 answer:

Airida [17]2 years ago

7 0

(1) The intensity of a sound wave is linearly proportional to the change in the pressure squared.

(2) You are able to hear sounds from farther away on a cool night because sound waves are refracted toward<u> </u><u>warmer air </u><u>near the ground.</u>

(3) When the trough of one wave collides at the same time & place of the crest of an identical wave, destructive interference occurs.

(4) The time taken for the heater to provide the energy is 300 secs.

(5) The total amount of heat provided to the ice sample is 7,980 cal.

(6) The amount of heat required to increase the temperature of water is 33,472 J.

<h3>Intensity of sound</h3>

The intensity of a sound wave is linearly proportional to the change in the pressure squared and inversely proportional to the density and the speed.

<h3>Refraction of sound waves</h3>

You are able to hear sounds from farther away on a cool night because sound waves are refracted toward warmer air near the ground.

<h3>Destructive inference</h3>

When the trough of one wave collides at the same time & place of the crest of an identical wave, destructive interference occurs.

<h3>Time taken for the heater to provide the energy</h3>

E = Power x Time

t = E/P

t = 60,000/200

t = 300 secs

<h3>Total amount of heat provided to the ice sample</h3>

Q = 79.8 cal/g x 100 g

Q = 7,980 cal

<h3>Amount of heat required to increase the temperature of water</h3>

Q = 0.1 kg x 4184 J/kgC x (100 - 20)

<em>When water vapor condense into liquid water, temperature = 100⁰C</em>

Q = 33,472 J

Thus, the intensity of a sound wave is linearly proportional to the change in the pressure squared.

You are able to hear sounds from farther away on a cool night because sound waves are refracted toward<u> </u><u>warmer air </u><u>near the ground.</u>
When the trough of one wave collides at the same time & place of the crest of an identical wave, destructive interference occurs.
The time taken for the heater to provide the energy is 300 secs.
The total amount of heat provided to the ice sample is 7,980 cal.
The amount of heat required to increase the temperature of water is 33,472 J.

Learn more about intensity of sound here: brainly.com/question/17062836

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2 years ago

A hiker begins a trip by first walking 25.0 km southeast from her car. She stops and sets up her tent for the night. On the seco

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Answer:

(a)

$x_1=17.68km\\y_1=-17.68km\\x_2=20km\\y_2=34.64km$

(b) $r=41.32km$

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Explanation:

Let us take the north direction to be the positive y-axis and the east to be positive x-axis.

First day:

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She starts off at the stopping point of last day. This time, both the y- and x-components are positive.

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Therefore, total displacements:

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$y=y_1+y_2=(-17.68+34.64)km=16.96km$

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