Given n dice, each with m faces, numbered from 1 to m, find the number of ways to get a given sum x. X is the summation of values on each face when all the dice are thrown.

What are similarities and differences between refraction, reflection, diffraction and absorption?

The softest and hardest minerals are: softest hardest

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?