When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus. The distance between the principal focus and the centre of the lens is called the focal length.
Answer:
The core is in a cube structure, extreme temperatures make the atoms to move so quickly that there is no alteration of the structure hence, no melting.
Explanation:
In the case of extremely high temperatures, atoms change position but still keep their original shape.
Further explanation:
In the case of high temperatures, the atoms making up a cube move rapidly and change position, the change of position is the melting.
The penis is the genital organ
I have no idea which is not a resource but if I’m taking an educated guess it would be reproduction.
