a$)$ Briefly discuss common coating procedures used in the preparation of a

polymeric sample for use in a scanning electron microscope.

b$)$ A creep test was conducted on a material at a stress of $120$ MPa. At a

temperature of $800$oC$.$

Calculate the steady state creep rate of the test material given the following

material data.

$$ Boltzmann$$s constant is $8\mathrm{.}31$J$/$mol$-$K$.$

$$ Activation energy for creep is $272000$ J$/$mol

$$ Material constant is $211\mathrm{.}3$s$-1$

$$ stress exponent is $2$