New Worksheet - Physics - Sound - Part 2

Formulas
speed of sound = [1087 + 1.1 (temperature – 32)] ft/sec
intensity level = 10 log (intensity / intensity of threshold of hearing)
Mach number = speed of object / speed of sound

Problems
1. What is the speed of sound at a temperature of 72° F?
Answer: _______________________

2. What is the speed of sound at a temperature of 81° F?
Answer: _______________________

3. What is the speed of sound at a temperature of 53° F?
Answer: _______________________

4. The intensity of a given sound is 10-2 Watts / m2. What is the intensity level in decibels?
Answer: _______________________

5. The intensity of a given sound is 10-8 Watts / m2. What is the intensity level indecibels?
Answer: _______________________

6. What is the Mach number for a plane traveling at 921 mph when the temperature is 47° F?
Answer: _______________________

7. What is the Mach number for a plane traveling at 817 mph when the temperature is 54° F?
Answer: _______________________

8. What is the Mach number for a plane traveling at 736 mph when the temperature is 42° F?
Answer: _______________________

9. What is the Mach number for a plane traveling at 942 mph when the temperature is 37° F?
Answer: _______________________

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