Which of the following represents the decibel level of rustling of tree leaves in normal circumstance?
A. 10 db
B. 20 db
C. 60 db
D. 100 db
Answer: Option A
A. 10 db
B. 20 db
C. 60 db
D. 100 db
Answer: Option A
Which of the following substances will have the lowest speed of sound?
A. Water
B. Steel
C. Glasss
D. Air
What is the approximate range of sound for humans?
A. 20Hertz to 2000 Hertz
B. 20Hertz to 200Hertz
C. 20 Hertz to 20000 Hertz
D. 2 Hertz to 2000 Hertz
Loudness of sound depends upon which of the following?
A. Frequency
B. Wavelength
C. Amplitude
D. Overtones
A. On land
B. In air
C. In space
D. Underwater
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