Subjects
| Sections | |||
|---|---|---|---|
| What is a Wave? | 27 mins | 0 completed | Learn |
| The Mathematical Description of a Wave | 36 mins | 0 completed | Learn |
| Waves on a String | 24 mins | 0 completed | Learn |
| Wave Interference | 17 mins | 0 completed | Learn |
| Standing Waves | 24 mins | 0 completed | Learn |
| Sound Waves | 13 mins | 0 completed | Learn |
| Standing Sound Waves | 13 mins | 0 completed | Learn |
| Sound Intensity | 25 mins | 0 completed | Learn |
| The Doppler Effect | 17 mins | 0 completed | Learn |
| Beats | 10 mins | 0 completed | Learn |
The sound intensity is 0.0080 W/m2 at a distance of 10 m from an isotropic (same intensity in all directions) point source of sound.
(a) What is the power of the source?
(b) What is the sound intensity 5.0 m from the source?
(c) What is the sound level 10 m from the source? The threshold of human hearing
is I0 = 1.0 × 10 -12 W/m2 .
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