9. The driving force for diffusion reactions, according to equation Fick's first law is the concentration gradient. 10 Increasing temperatura land to incrance tha ability of

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Q(2): Answer with (True) or (False) (Only Nine)
1. In the absence of a gradient, atoms will still randomly jump
about', without any net flow of matter.
2. In the yield area or the yield point, both elastic and plastic strains
are of great value without any significant increase in stress.
3. work of fracture is the resistance of a material to crack propagation.
4. Elastic energy associated with a dislocation is proportional to the
magnitude of its Burger's vector.
5. The number of substitutional atoms or ions in the structure remains
nearly constant, even when the temperature is changed.
6. Failure occurs in brittle materials as a result of the formation of
internal cracks that cannot be seen from the outside.
7. In Interstitial mechanism, the atoms exchange places through
rotation about a mid-point. The activation energy for the process is
very high.
8. A higher yield point reveals greater hardness of the metal. A higher
value of the maximum stress point shows that the metal is a
stronger one.
9. The driving force for diffusion reactions, according to equation
Fick's first law is the concentration gradient.
10. Increasing temperature, lead to increase the ability of
materials to resist elastic deformation and ultimate stresses,
whereas the ductility and the yielding behavior will increases.
Transcribed Image Text:Q(2): Answer with (True) or (False) (Only Nine) 1. In the absence of a gradient, atoms will still randomly jump about', without any net flow of matter. 2. In the yield area or the yield point, both elastic and plastic strains are of great value without any significant increase in stress. 3. work of fracture is the resistance of a material to crack propagation. 4. Elastic energy associated with a dislocation is proportional to the magnitude of its Burger's vector. 5. The number of substitutional atoms or ions in the structure remains nearly constant, even when the temperature is changed. 6. Failure occurs in brittle materials as a result of the formation of internal cracks that cannot be seen from the outside. 7. In Interstitial mechanism, the atoms exchange places through rotation about a mid-point. The activation energy for the process is very high. 8. A higher yield point reveals greater hardness of the metal. A higher value of the maximum stress point shows that the metal is a stronger one. 9. The driving force for diffusion reactions, according to equation Fick's first law is the concentration gradient. 10. Increasing temperature, lead to increase the ability of materials to resist elastic deformation and ultimate stresses, whereas the ductility and the yielding behavior will increases.
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