Sound

Everyday Science
Echoes maybe heard more than once due to
multiple reflections
single time reflection
refraction
diffraction of waves
Author: rikazzz Comment
Sound
Stethoscopes operate on the transmission of
electricity
signals
light
sound
Author: rikazzz Comment
Sound
If a nurse counts 68 heartbeats in 1 minute, then the period of heartbeats should be
1.9 s
2 s
0.88 s
3 s
Author: rikazzz Comment
Sound
To communicate with each other, Elephants use
low frequency sound waves
low frequency light waves
high frequency sound waves
low frequency heat waves
Author: rikazzz Comment
Sound
The sound produced by a large drum is louder than a small drum because of its
distance from sticks
small vibrating area
large vibrating area
none of above
Author: rikazzz Comment
Sound
When sound interacts with materials and boundaries, it displays all the properties of
heat
waves
light
electricity
Author: rikazzz Comment
Everyday Science
Normal human ear can hear sound frequencies in a range from:
40-40,000 Hz
30-35000 Hz
20-20,000 Hz
50-50,000 Hz
Author: rikazzz Comment
Sound
The intensity level of the faintest audible sound is
25 dB
0 dB
10 dB
100 dB
Author: rikazzz Comment
Sound
Frequency of tuning fork depends on
mass of its prongs
area of its prongs
stiffness of its prongs
density of its prongs
Author: rikazzz Comment
Everyday Science
Bats can hear sounds of frequency up to:
30,000 Hz
120,000 Hz
180,000 Hz
15,000 Hz
Author: rikazzz Comment

Go to Page