Mechanical twinning occurs in metals having body center cubic and hexagonal closed packed structures. Twinning is said to occur when a portion of a crystal takes up an orientation that is related to the orientation of the untwinned lattice in a definite symmetrical manner.
Answer:
oxygen molecule
Explanation:
I belive it is oxygen molecule
Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Answer:
Reproductive cells contain only four gene copy.
Explanation:
