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What color is an orange?

An observer that stands still as the electron moves by him, will observe

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?