Reference no: EM132600059
The sound intensity 29.1 m from a wailing tornado siren is 0.100 W/m2.
Part A
Part B
Part C
What is the sound intensity level?
What intensity is the siren at a distance of 116 m ?
In a noisy neighborhood, the weakest sound likely to be heard over background noise is 60.0 dB . Calculate the maximum distance at which the siren can be heard.
Give your answer in kilometers.
How light intensity changes with distance depends on the type of light source. Some sources are directional while some are not.
A source like the Sun shines light essentially equally in all directions so that the area over which the light is spread is the area of a sphere (Asphere=4πr2). A directional light source, however, like a flashlight will concentrate the light in a beam which has a circular shape (Acircle=πr2).
Use this information to answer the questions below
Part A
A typical 100 W light bulb produces 4.0 W of visible light. The other 96 W are dissipated as heat and infrared radiation. What is the light intensity 1.66 m away from the light bulb?
Part B
A krypton laser produces a cylindrical red laser beam 2.20 mm in diameter with 2.50 W of power. What is the light intensity 1.66 m away from the laser?
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What is cost of good sold under weighted-average cost method
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What is the sound intensity level
: The sound intensity 29.1 m from a wailing tornado siren is 0.100 W/m2.
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