Which of the following is true of sounds?
A
sound travels faster in air at 20oC than at 30oC
B
the frequency of a given sound wave changes when it crosses the boundary seperating two media
C
the wavelength of a given sound wave in air decreases as the temperature increases
D
sound waves cannot be reflected
Verified Correct Answer: C.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #28513)