What is the best way to measure a reaction efficiency

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

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table