Speed of sound in iron or steel at 200C………..
a) 344 m/s
b) 5130 m/s
c) 1531 m/s
d) 1498 m/s
Speed of sound in Glass at 200C………………
a) 1531 m/s
b) 344 m/s
c) 3962 m/s
d) 1498 m/s
As compare to air, sound travels faster in……..
a) Liquid
b) Gases
c) Vacuum
d) Fluids
For communication astronauts use radio because
a) Sound travels at very high speed in vacuum
b) Vacuum repels sound
c) Sound energy turns into light in vacuum
d) Sound doesn’t travel in vacuum
Pitch of note depends upon the ……………
a) Tension on string
b) Diameter of wind hole
c) Tension on drum surface
d) Diameter of drum surface
Sound is measured by units that are
called…..
a) Hertz (Hz)
b) Decibels (dB
c) Meters (m)
d) Pascal (Pa)
