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
You might also like to view...
The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
A. its speed is constant. B. its speed is increasing. C. its speed is decreasing. D. its speed is a maximum. E. its speed is a minimum.
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.
The time for one complete cycle of a periodic process to take place is called the period
a. True b. False Indicate whether the statement is true or false
A(n) ______________ is a tested explanation of a broad segment of basic natural phenomena
Fill in the blank(s) with correct word