Question

d) The decrease of atm. pressure.
of
His
ec.
24. The velocity of sound in air is:
a) Directly proportional to the pressure
b) Inversely proportional to the pressure
c) Directly proportional to the square root of
temperature
d) Independent upon the pressure
25. Bells are made of metal and not of wood,
because:
a) The thermal conductivity of metal is greater
than that of wood
b) The density of metal is greater than that of
wood
c) The sound is not conducted by metal but is
radiated
d) Wood dampens vibration while metals are
elastic​

Answer 1

Answer:

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Explanation:

b is the correct ans