True or false? Some energy sources are more packed with energy than others.

please help me!
*science*

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory