The intensity level of sound 30 m from a jet airliner is 120 dB. At what distance from the airplane will the sound intensity level be a tolerable 100 dB? (Assume spherical spreading of sound.)

a. 60 m
c. 300 m
b. 90 m
d. 400 m


C

Physics & Space Science

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a. True b. False Indicate whether the statement is true or false

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A(n) ______________ is a tested explanation of a broad segment of basic natural phenomena

Fill in the blank(s) with correct word

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In an adiabatic free expansion

A. no heat is transferred between a system and its surroundings. B. the pressure remains constant. C. the temperature remains constant. D. the volume remains constant. E. the process is reversible.

Physics & Space Science