Sounds Waves And Motion - Study Mode
[#61] Speed of sound in air is unaffected by change in
Correct Answer
(A) pressure
[#62] Bats can fly during dark nights and also prey. This is because
Correct Answer
(D) They produce ultrasonic waves and are guided by them
[#63] What is the intensity level of very low audio sound?
Correct Answer
(B) 0dB
[#64] Which of the following determines the loudness or softness of a sound?
Correct Answer
(D) amplitude
[#65] If the frequency of a wave increases, what will be the effect on its wave length?
Correct Answer
(C) It decreases