The velocity of sound in air will be doubled if it's ...
The velocity of sound in air will be doubled if it's absolute temperature is
Quadrupled
Constant
Halved
Doubled
Correct answer is A
In general, the velocity of sound in air varies directly as the square root of temperature measured in kelvin.
That V ∝√T⟹V2∝T.ThereforeV21T1=V22T2Thus Let V1=4m/sT1=10KTherefore V2=2V1=8m/s⟹4210=82T2T2=64×1016=40KT2=4T1
Thus when the velocity of sound in air is doubled, it's absolute temperature will be quadrupled.