For the expression to give an accurate value of the speed of sound in a solid bar
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
For the expression v=Y/ρ to give an accurate value of the speed of sound in a solid bar, which of the following effects must be negligibly small?
(a) Viscous damping inside the solid
(b) Lateral strain due to the Poisson effect
(c) Gravitational compressive stress
(d) Thermal expansion of the bar