Question

The unit of impulse per unit area is same as that of:

• A. coefficient of viscosity
• B. surface tension
• C. bulk modulus
• D. none of the above

Answer 1

The correct option is A coefficient of viscosity

$\frac{Impulse}{Area}=\frac{f\times t}{Area}=\frac{\left[M^1{L}^1{T}^{-2}\right]\times \left[T^1\right]}{\left[L^2\right]}=\left[M{L}^{-1}{T}^{-1}\right]$

$Viscocity=\frac{stress}{\frac{dv}{dy}}=\left[M{L}^{-1}{T}^{-1}\right]$

$SurfaceTension=\frac{f}{l}=\frac{\left[M{L}^1{T}^{-2}\right]}{\left[L^1\right]}={[MT}^{-2}]$

$BulkModulus=\frac{dP}{dV/v}=\left[M^1{L}^{-1}{T}^{-2}\right]$

Hence, option A is correct.