For stars to form, the temperature of the hydrogen in a nebula must be more than 14 million Kelvin. How did gravitational attraction help achieve these high temperatures?

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.