An unbalanced force of 25.0 n is applied to a 12.0 kg mass

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?