While exploring a coal mine, scientists found plant fossils which had been preserved by an earthquake in the ceiling of the mine. Samples taken from one of the fossils had carbon‑14 activities of 20.0 counts / min. A reference sample of the same size from a plant alive today has a carbon-14 activity of 160.0 counts / min. If carbon‑14 has a half-life of 5730 years, what is the age of the plant fossil in years?

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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c. orbital shape i hope this is correct