Question

1. The velocity of sound in vacuum is ---
a) 332 m/
s b ) 330 m/s
c) 0 m/s
d) 1 m/s
The speed of sound in gas ------- ------ with increase of humidity
a) Increase b) Decrease
c) No Change
d) None
A wave travel a distance of 30m in the time interval of 0.2 s. Its speed is ---
a) 10 m/s b) 1000 m/s
c) 0.1 m/s
d) 100 m/s
4. When the pressure of the gas increase the speed of the sound ------
a) Increase b) Decrease
c) No Change
d) None
Match the following
Columnl
Column II
a) High pitch
p) faint sound
b) Low Pitch
q) loud sound
c) Small amplitude
r) high frequency
d) Large amplitude
s) low frequency
In soda- acid fire extinguisher
2 NaHCO3 + H2SO4 ---->
a) Na2SO4 +2H20 + 2CO2 b) Na2SO4 c) Na2SO4 + H2O + O2 d)) Na2SO4 + H2O + 1
TAltamannsthacade fira avtinguichertonut out​

Answer 1

Answer:

1..(c)

2..(a)

4..(a)

I dont know rest of the answers.. Sorry bro