Waves, Sound, and Light: Sound and Music

Sound and Music: Audio Guided Solution

Extra Problem 14:

A stereo speaker that we shall consider as a small source emits sound waves with a power output of 108 W. Find the intensity (in W/m²) at a distance of 10.3 m from the source. 

Audio Guided Solution

Habits of an Effective Problem Solver

• Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
• Identify the known and unknown quantities and record in an organized manner, often times they can be recorded on the diagram itself. Equate given values to the symbols used to represent the corresponding quantity (e.g., v = 12.8 m/s, λ = 4.52 m, f = ???).
• Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
• Identify the appropriate formula(s) to use.
• Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.

Read About It!

Get more information on the topic of Sound and Music at The Physics Classroom Tutorial.

• Speed of Sound
• Intensity and the Decibel Scale
• Standing Wave Patterns
• Fundamental Frequency and Harmonics
• Physics of Guitar Strings
• Open-End Air Columns
• Closed-End Air Columns
• Interference and Beat Formation

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