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4. A sample of rainwater was determined to have a pH of 6.35. What were the H concentrations of the sample? C. 4.47 x 10-7 M A. 3.10 x 106 M B. 4.15 x 10°M D. 5.26 x 107 M 5. What is the decibel rating of the sound of an orchestra playing a movement for pianissimo at 8.6 x 105 W/m²? А. 62 dB В. 68 dв с. 79 dв D. 82 dB

4. A sample of rainwater was determined to have a pH of 6.35. What were the H concentrations of the sample? C. 4.47 x 10-7 M A. 3.10 x 106 M B. 4.15 x 10°M D. 5.26 x 107 M 5. What is the decibel rating of the sound of an orchestra playing a movement for pianissimo at 8.6 x 105 W/m²? А. 62 dB В. 68 dв с. 79 dв D. 82 dB

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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4. A sample of rainwater was determined to have a pH of 6.35. What were the H concentrations of the sample? C. 4.47 x 10-7 M D. 5.26 x 107 M A. 3.10 x 106 M B. 4.15 x 10°M 5. What is the decibel rating of the sound of an orchestra playing a movement for pianissimo at 8.6 x 10-5 W/m2? A. 62 dB В. 68 dв C. 79 dB D. 82 dB
Transcribed Image Text:4. A sample of rainwater was determined to have a pH of 6.35. What were the H concentrations of the sample? C. 4.47 x 10-7 M D. 5.26 x 107 M A. 3.10 x 106 M B. 4.15 x 10°M 5. What is the decibel rating of the sound of an orchestra playing a movement for pianissimo at 8.6 x 10-5 W/m2? A. 62 dB В. 68 dв C. 79 dB D. 82 dB
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