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3 years ago

When the amplitude of a wave triples, the intensity changes by a factor of [blank](1/3,1/9,3,9)

Physics

2 answers:

trasher [3.6K]3 years ago

6 0

Answer:

1. It becomes 9 times.

2. it becomes one fourth times.

3. It becomes one hundredth times.

4. It becomes one ninth times.

Explanation:

Intensity of a wave is directly proportional to the square of amplitude of the wave and inversely proportional to the square of the distance between the source and observation point.

1. As the amplitude of the wave is tripled, the intensity becomes 9 times.

2. As the amplitude becomes half, the intensity becomes one fourth.

3. As the distance between the source and the ear is one tenth, the intensity becomes one hundredth.

4. As the distance between source and ear is one third, the intensity becomes one ninth.

sladkih [1.3K]3 years ago

5 0

1. 9

2. 1/4

3. 1/100

4. 9

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Answer:

The thickness of the oil slick is $1.95\times10^{-7}\ m$

Explanation:

Given that,

Index of refraction = 1.28

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Using formula of thickness

$2nt= m\lambda$

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2 years ago

Rubber is which of the following?

MariettaO [177]

Rubber is an insulator

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Mnenie [13.5K]

Answer:

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Are mass and volume related?: Mass and volume are two units used to measure objects. Mass is the amount of matter an object contains, while volume is how much space it takes up.We can say that the volume of the object is directly proportional to its mass. As the volume increases the mass of the object increases in direct proportion.

How can density of an object be determined?: If the mass of an object increases then its density increases because density is directly proportional to mass.

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Explanation:

<h2>Hope this helps! </h2><h2 />

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3 years ago

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makvit [3.9K]

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So, for this farsighted person,
do = 25 cm and di = -80
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3 years ago

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7nadin3 [17]

Answer:

<h2>C. <u>0.55 m/s towards the right</u></h2>

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Using the conservation of law of momentum which states that the sum of momentum of bodies before collision is equal to the sum of the bodies after collision.

Momentum = Mass (M) * Velocity(V)

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0.15 * 0.75kgm/s = 0.1125 kgm/s

Using the law of conservation of momentum;

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0.25x = 0.25-0.1125

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x = 0.55m/s

Since the 0.15 kg ball moves off to the right after collision, the 0.25 kg ball will move at <u>0.55 m/s towards the right</u>

<u></u>

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