Determine the carburizing time (in s) necessary to achieve a carbon concentration of 0.44 wt% at a position 1.4 mm into an iron-carbon alloy that initially contains 0.031 wt% c. the surface concentration is to be maintained at 1.2 wt% c, and the treatment is to be conducted at 1080°c. assume that d0 = 5.1 × 10-5 m2/s and qd = 154 kj/mol.

answer:

i lost in getting someone back.

i learned that people are really two-faced and no matter how angelic someone appears they always have a devil side and that you cant trust anyone anymore no matter how dear they are to you.

if your wondering who it waz it waz mah still miss her tho

~batmans wife dun dun

answer:

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explanation:

answer:

ikr

but i think it's when 2 couples kiss and they rlly love eachother so much and there kiss is slowly idk what i'm sayingxd