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- 1. Multiple Choice
The persistence of hearing for human ear is
0.001
0.1
0.01
- 2. Multiple Choice
sound needs a medium for the propagation
TRUE
FALSE
- 3. Fill in the Blank
velocity =
- 4. Multiple Choice
Echo is used to determine the ____________ of sound waves
wavelength
velocity
speed
- 5. Multiple Choice
Frequency ranging between 20 Hz AND 20,000 Hz
audible waves
infrasonic waves
ultrasonic waves
- 6. Poll
your opinion for my presentation
good
excellent
not bad
bad
- Answer choicesTagsAnswer choicesTags