Multiple Choice
You are in a park when you spot your friend 100 m away.At what lowest decibel should you shout your greetings so that your friend can just hear you? Assume that your friend has normal hearing.
A) 30 dB
B) 40 dB
C) 50 dB
D) 60dB
E) 70 dB
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q39: In which of the following is the
Q40: The sound intensity in front of a
Q41: A string under tension carries a transverse
Q42: A sound pulsar unit puts out short
Q43: If you were to reduce the amplitude
Q45: A siren of frequency 3.20 kHz moves
Q46: At an outdoor bandstand,what would be
Q47: . A whistle is whirled around in
Q48: Use the following scenario to answer
Q49: Two sounds differ by 20 dB.This means