What happens to ocean crust and mantle after subduction

Litmus paper is made from water-soluble dyes which are extracted from lichens. this paper is used as an acid-base indicator. which of these common household substances would turn blue litmus paper red? a) bleach b) lye c) soap d) vinegar

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?