In transient mass diffusion analysis, can we treat the diffusion of a solid into another solid of finite thickness (such as the diffusion of carbon into an ordinary steel component) as a diffusion process in a semi-infinite medium? Explain.

What will be an ideal response?


The diffusion of a solid species into another solid of finite thickness can usually be treated as a diffusion process in a semi-infinite medium regardless of the shape and thickness of the solid since the diffusion process affects a very thin layer at the surface.

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During metamorphosis, tick larvae change into ____________________

Fill in the blank(s) with correct word

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List the steps in sketching a fillet or radius.

What will be an ideal response?

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There are differences between front-wheel bearings on front-wheel drives and rear-wheel drives. Technician A says most front-wheel drive vehicles use one tapered roller bearing whereas rear-wheel drive vehicles use two. Technician B says most front-wheel drive vehicles use one-piece sealed bearing units. Who is correct?

A. A only B. B only C. both A and B D. neither A nor B

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Arcing between brushes and the commutator is caused by armature reaction.

Answer the following statement true (T) or false (F)

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