Question

possible points: 1
an engineer searching for a material to develop a new kind of \indestructible\ eyeglass frame would desire what characteristics?
high hardness, high elasticity, high brittleness.
low brittleness, high hardness, high elasticity.
low elasticity, high brittleness
high brittleness, low hardness, low elasticity.

Explanation:

An "indestructible" eyeglass frame needs to resist scratching (high hardness), bend without breaking (high elasticity), and not shatter easily (low brittleness). The other options include properties that would make the frame prone to breaking or damage.

Answer:

B. Low brittleness, high hardness, high elasticity.