Q: Young’s modulus of steel is 19 × 10^{10} N/m^{2}. Express it in dyne/cm^{2}.

Sol. The SI unit of Young’s modulus is N/m^{2}

Given Y = 19 × 10^{10} N/m^{2}

$\large = 19 \times 10^{10}(\frac{10^5 dyne}{(10^2 cm)^2})$

= 19×10^{11} dyne/cm^{2}