Physics MCQs: Chapter 8+9

1) Sound waves cannot propagate through

a)    Walls

b)   Grass

c)    Wood

d)   Vacuum

2) Experimental value of speed of sound in air at 0⁰C is

a)    280 ms^-1

b)   320 ms^-1

c)    332 ms^-1

d)   340 ms^-1

3) Speed of sound in a gas is

a)    Directly proportional to absolute temperature T

b)   Inversely proportional to T

c)    Directly proportional to  T ^½

d)   Directly proportional  T²

1.d

2.c

3.c