Scientists typically use carbon dating to gauge the age of fossils and artifacts. This only works on objects that were at one time living, because all living objects contain carbon. By measuring the amount of carbon left in an object, scientists can determine how long it has been dead.
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Answer:
What is the relationship between potential energy, kinetic energy, and speed as the skater moves down and up the U-shaped ramp?
Explanation:
"B. pointed arches and stained-glass windows" does not describe a Gothic cathedral, which in general have more "studded" tops that allow for great room inside.
Its A or D hope this helps
