4
8
4
There are many options: 2 rectangular prisms 2 cubes 2 parallelepipeds 2 tetrahedrons 2 square based pyramids are some possibilities using convex polyhedra.
2 prism
Probably infinite. The smallest is known as Ramanujan's number, 1729 using cubes of 1 and 12, and of 9 and10. Read more about the genius Ramanujan in Wikipaedia.
93
3
13
They are all called cuboids or hexahedra. There are no names that give more details about the prisms' structure.
8
4
6
There are many options: 2 rectangular prisms 2 cubes 2 parallelepipeds 2 tetrahedrons 2 square based pyramids are some possibilities using convex polyhedra.
3 x 3 x 4 = 36 cm3
Using lenses to refract light rays in specific directions. Using mirrors to reflect light in desired angles. Using prisms to separate light into its different colors.
You can crack ice cubes by applying heat, using a hammer or mallet, soaking them in warm water, or wrapping them in a towel and hitting them against a hard surface. Another method is to place the ice cubes in a plastic bag and gently crush them with a rolling pin.
2 prism