Explain how crust density is related to ocean trench.

The intense pressure, lack of sunlight, and frigid temperatures of the hadalpelagic zone make ocean trenches some of the most unique habitats on Earth. When the leading edge of a dense tectonic plate meets the leading edge of a less-dense plate, the denser plate bends downward.

"What happens at a trench to older oceanic crust?"

Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5