Question

what was the sensitive, well - insulated tool willard f. libby used to date artifacts with known ages?
○ x - ray machine
○ richter scale
○ geiger - müller tubes
○ petri dish

Explanation:

Willard F. Libby developed radiocarbon dating. Geiger - Müller tubes are used to detect radiation, which is relevant for radiocarbon dating (measuring the decay of carbon - 14). An X - ray machine is for imaging, a Richter scale measures earthquake magnitude, and a petri dish is for culturing microorganisms, none of which are used for dating artifacts as Libby did.

Answer:

Geiger - Müller tubes