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By what factor will the sound of a source change the intensity of the waves if the distance is tripled from the sound source?
Wiki User
∙ 14y ago
For sound intensity (acoustic intensity) we use in the free field (direct field) the inverse square law = 1/r². I1 and r1 belong to the close distance and I2 and r2 belong to the far distance.
I2 = I1 * (r1/r2)²
I2 = I1 * (1/3)² = I1 / 9
Three times farther away gives one ninth the sound intensity of the close sound intensity.
Wiki User
∙ 14y ago
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How is the magnetic field of an eletromagnet controlled?
The intensity of the magnetic field (measured in Teslas) produced by an electromagnet is directly proportional to the current (measured in Amperes) passing through it's coil windings. Therefore, as long as other variables remain constant, one can vary the intensity of the magnetic field by varying the current. Specifically, the intensity of the magnetic field will vary by the same factor as the current, so if the current is halved, the intensity of the magnetic field will also be halved; and if the current is tripled, the intensity of the magnetic field will also be tripled.
Tripling the distance from a constant intensity point will cause the illumination to?
Decrease by a factor of 9
An increase of 20 dB increases the sound intensity by a factor of?
A factor of 100. Every 10 dB, the intensity increases by a factor of 10.A factor of 100. Every 10 dB, the intensity increases by a factor of 10.A factor of 100. Every 10 dB, the intensity increases by a factor of 10.A factor of 100. Every 10 dB, the intensity increases by a factor of 10.
If both the mass and velocity of a ball is tripled the kinetic energy is increased by a factor of?
(1/3)2 = 1/9 of the original force before the move.
By how many times would the gravitational force between two objects decrease if the distance between the two objects was tripled?
By a factor of 9. Gravitational force is inversely proportional to the square of the distance.By a factor of 9. Gravitational force is inversely proportional to the square of the distance.By a factor of 9. Gravitational force is inversely proportional to the square of the distance.By a factor of 9. Gravitational force is inversely proportional to the square of the distance.
How does the intensity of a sound wave change if the distance from the source increases by a factor of 2?
The intensity increases by a factor of 4-APEX
How does the intensity of a sound wave change if the distance from the source is reduced by a factor of 4?
- 6 dB is incorrect. It will decrease by 12 dB.
What will happen to the force of gravity if the mass of one of the objects is tripled?
You didn't specify what force. some forces have an inverse-square relationship. That is to say, the force of gravity, or electrostatic attraction or repulsion, is inversely proportional to the square of the distance - if the distance is tripled, the force is reduced by a factor of 9.You didn't specify what force. some forces have an inverse-square relationship. That is to say, the force of gravity, or electrostatic attraction or repulsion, is inversely proportional to the square of the distance - if the distance is tripled, the force is reduced by a factor of 9.You didn't specify what force. some forces have an inverse-square relationship. That is to say, the force of gravity, or electrostatic attraction or repulsion, is inversely proportional to the square of the distance - if the distance is tripled, the force is reduced by a factor of 9.You didn't specify what force. some forces have an inverse-square relationship. That is to say, the force of gravity, or electrostatic attraction or repulsion, is inversely proportional to the square of the distance - if the distance is tripled, the force is reduced by a factor of 9.
What happens if a circle's radius is tripled?
If the radius is tripled then the Area will be greater by a factor of 9. And the circumference will be greater by a factor of 3.
How is the magnetic field of an eletromagnet controlled?
The intensity of the magnetic field (measured in Teslas) produced by an electromagnet is directly proportional to the current (measured in Amperes) passing through it's coil windings. Therefore, as long as other variables remain constant, one can vary the intensity of the magnetic field by varying the current. Specifically, the intensity of the magnetic field will vary by the same factor as the current, so if the current is halved, the intensity of the magnetic field will also be halved; and if the current is tripled, the intensity of the magnetic field will also be tripled.
Tripling the distance from a constant intensity point will cause the illumination to?
Decrease by a factor of 9
How does intensity vary with distance from the source?
It's an inverse-square law - for instance, double the distance, and the intensity will be reduced by a factor 1/4.This assumes that there is nothing absorbing the light (for instance, fog); if there is, the intensity in the above example will of course be even less than 1/4 the original intensity.
An increase of 20 dB increases the sound intensity by a factor of?
A factor of 100. Every 10 dB, the intensity increases by a factor of 10.A factor of 100. Every 10 dB, the intensity increases by a factor of 10.A factor of 100. Every 10 dB, the intensity increases by a factor of 10.A factor of 100. Every 10 dB, the intensity increases by a factor of 10.
A sound that is perceived as twice as loud requires how much intensity?
Scroll down to related links and look at "Sound level change and the change of the respective factor of volume / loudness, sound pressure / sound intensity".
If both the mass and velocity of a ball is tripled the kinetic energy is increased by a factor of?
(1/3)2 = 1/9 of the original force before the move.
How does the force of gravity between two bodies change when the distance between them tripled?
The gravitational pull of an object in relation to its distance from another object is an inverse square law. When the distance between two objects is doubled, their pulled on each other is quartered. G ∝ 1/r2 where G is the gravitational pull and r is the separation.
By how many times would the gravitational force between two objects decrease if the distance between the two objects was tripled?
By a factor of 9. Gravitational force is inversely proportional to the square of the distance.By a factor of 9. Gravitational force is inversely proportional to the square of the distance.By a factor of 9. Gravitational force is inversely proportional to the square of the distance.By a factor of 9. Gravitational force is inversely proportional to the square of the distance.
