Question

The relation between $Y$, $\eta$ and $B$ is

• A. $\frac{1}{Y}$ $=\frac{1}{3\eta }$ $+\frac{1}{9B}$
• B. $\frac{9}{Y}$ $=\frac{1}{\eta }$ $+\frac{3}{B}$
• C. $\frac{1}{\eta }$ $=\frac{1}{B}$ $+\frac{1}{Y}$
• D. $\frac{9}{Y}$ $=\frac{3}{\eta }$ $+\frac{1}{B}$

Answer 1

Answer: (D)

The relation between $Y$, $\eta$ and $B$ is
$\frac{9}{Y}$ $=\frac{1}{B}$ $+\frac{3}{\eta }$
where $Y$ is Young’s modulus, $B$ is Bulk modulus and $\eta$ is modulus of rigidity.