Energy passes from the suns core through a dense region called the what?

What does the symbol (–hfus) indicate in a phase change?

What’s the theoretical yield of solid lead

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.