Sound

Everyday Science
Which rays do bats and dolphins use to see?
electric waves
light waves
heat waves
ultrasound waves
Author: rikazzz Comment
Everyday Science
Human ear cannot hear sound of frequency more than?
10,000 Hz
20,000 Hz
5,000 Hz
15,000 Hz
Author: rikazzz Comment
Everyday Science
Human ear cannot hear sound of frequency less than?
20 Hz
30 Hz
10 Hz
40 Hz
Author: rikazzz Comment
Sound
A sound wave has a frequency of 3 KHz and wavelength 20 cm. How much will it take to travel 2 km?
4.2 s
3.33 s
3.9 s
4.65 s
Author: rikazzz Comment
Sound
Sound energy passing per second through a unit area held perpendicular to the direction of propagation of sound waves is called
loudness of sound
pitch of sound
quality of sound
intensity of sound
Author: rikazzz Comment
Sound
The loudness of a sound is directly proportional to the
logarithm of pitch
logarithm of intensity
vibration
logarithm of quality
Author: rikazzz Comment
Sound
When the frequency of sound increases, the wavelength and period
becomes negative
remains constant
also increases
decreases
Author: rikazzz Comment
Sound
Echoes may be heard more than once due to successive or multiple reflections
deflections
defraction
refractions
reflections
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Sound
Intensities are scaled by factors of
20
100
10
1000
Author: rikazzz Comment
Everyday Science
Sound waves can be transmitted by any
medium
vacuum
empty
none of above
Author: rikazzz Comment

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