All those regions in the
longitudinal wave in which vibrating particles of medium are moving closer to
one another and a momentary increase in volume and increase in density occurs,
are called……
a) Rarefactions
b) compression
c) both a and b
d) none of these
Speed of sound in Dry air at 00C……………..
a) 300 m/s
b) 332 m/s
c) 344 m/s
d) 962 m/s
Speed of sound in Dry air at 200C……………
NTS PST (B) --------2021
a) 300 m/s
b) 332 m/s
c) 344 m/s
d) 962 m/s
Speed of sound in Water at 200C……………..
a) 300 m/s
b) 1232 m/s
c) 344 m/s
d) 1498 m/s
Speed of sound in Sea-water at 00C…………..
a) 1531m/s
b) 332 m/s
c) 344 m/s
d) 1498 m/s
Speed of sound in blood at 370C………………
a) 1531 m/s
b) 1498 m/s
c) 344 m/s
d) 1550 m/s
