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What resource is often compromised due to mining?

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

How does a large body of water, such as the ocean, influence climate?

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.