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Suppose a Turbine at 25,000 RPM Makes a Noise of 147

Question 59

Multiple Choice

Suppose a turbine at 25,000 RPM makes a noise of 147 decibels and at 30,000 RPM makes a noise of 163 decibels. What is the ratio of the sound intensity of the turbine at 30,000 RPM to the sound intensity at 25,000 RPM?


A) 39.8
B) 63.1
C) 50.1
D) 31.6

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