Which object would a geologist date using carbon-14 dating?

A. a dinosaur fossil
B. a woolly mammoth fossil
C. an ancient volcanic rock
D. an igneous rock

B.) A woolly mammoth fossil

Explanation:

Carbon-14 dating is normally used to find the age of a once-living object.

C and D are not accurate because they both refer to types of igneous rocks -- only sedimentary rocks can be used for Carbon Dating.

A isn't accurate because dinosaurs lived a very, very long time ago, therefore, the isotopes wouldn't be detectable during modern times.

Though woolly mammoths lived a long time ago, it is a short time compared to the long time gap between dinosaurs and modern era. Radioactive isotopes may still be present in a woolly mammoth fossil sample.

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.