A pulsating sphere of radius a = 0.2 m radiates spherical waves in air at 3000 Hz and with intensity 80mW/m² at a distance 3.0 m from the surface of thesphere. The intensity at the surface of the sphere is?Select one:Oa.Ob. 0.72 W/m²O C.18 W/m²d. 32 mW/m²80 mW/m²For the sphere in question 9 which of the following holds?a.Select one:O C.The acoustic power is equal to 9.05 W and independent of the distance from the centre of the sphere.b. The acoustic power is equal to 9.05 W and inversely proportional to the square of the distance from the centre of the sphere.The acoustic power is equal to 4.0 mW and independent of the distance from the centre of the sphere.d. The acoustic power is equal to 4.0 mW and inversely proportional to the square of the distance from the centre of the sphere.

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A pulsating sphere of radius a = 0.2 m radiates spherical waves in air at 3000 Hz and with intensity 80mW/m² at a distance 3.0 m from the surface of the sphere. The intensity at the surface of the sphere is? Select one: a. 18 W/m² Ob. 0.72 W/m² OC. Od. 32 mW/m² 80 mW/m² For the sphere in question 9 which of the following holds?

A pulsating sphere of radius a = 0.2 m radiates spherical waves in air at 3000 Hz and with intensity 80mW/m² at a distance 3.0 m from the surface of the sphere. The intensity at the surface of the sphere is? Select one: a. 18 W/m² Ob. 0.72 W/m² OC. Od. 32 mW/m² 80 mW/m² For the sphere in question 9 which of the following holds?

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ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.

Question

A pulsating sphere of radius a = 0.2 m radiates spherical waves in air at 3000 Hz and with intensity 80mW/m² at a distance 3.0 m from the surface of the
sphere. The intensity at the surface of the sphere is?
Select one:
O
a.
Ob. 0.72 W/m²
O C.
18 W/m²
d. 32 mW/m²
80 mW/m²
For the sphere in question 9 which of the following holds?
a.
Select one:
O C.
The acoustic power is equal to 9.05 W and independent of the distance from the centre of the sphere.
b. The acoustic power is equal to 9.05 W and inversely proportional to the square of the distance from the centre of the sphere.
The acoustic power is equal to 4.0 mW and independent of the distance from the centre of the sphere.
d. The acoustic power is equal to 4.0 mW and inversely proportional to the square of the distance from the centre of the sphere.

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