Question

1. a typical fatigue curve depicts the applied stress as a function of the number of cycles it requires to fail the materials under applied stress. T or F
2. elongation is another term for strain. T or F
3. repeatable entity of a crystal structure is known as:
4. cup and cone fractures are a characteristic of brittle materials. t or F
5. electronegativity is the relative ability of an atom in a molecule to:

Answer 1

1. True. It depicts how many cycles are required for the material to fail under repeated stress.

2. True. Strain and elongation are two similar terms. We can think of a rubber band. By elongating it we are producing strain in it. This shows these two are similar terms.

3. Repeated entity of a crystal structure is known as Unit Cell. A unit cell is the most basic entity of any solid. By combining a large number of unit cells a solid structure or a crystal lattice is made.

4. False. Cup and cone are the properties shown by tensile material only. A brittle material breaks with sudden jerk.

5. Electronegativity is the relative ability of an atom in a molecule to attract other electrons to itself. The larger the electronegativity, greater the attraction.