For each of the four SEM micrographs showing fracture or fatigue surfaces: i) Identify the dominant failure mechanism pictured with one of the following letters.
A) Cleavage Fracture
B) Intergranular Fracture
C) Microvoid Coalescence
D) Fatigue Failure

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?