What large-scale feature of the ocean basin is formed when magma comes up out of Earth's mantle and hardens to form new oceanic crust?

A. mid-ocean ridge

B. subduction zone

C. hydrothermal vent

D. deep ocean trench

A. Mid Ocean Ridge.

Explanation:

The correct answer is A.

A mid-ocean ridge is formed by plate tectonics and it is a type of a seafloor mountain system.

It occurs when tectonic plates separate at the ocean basin and magma flows out of the separation, forming a crust after cooling.

They usually have a depth of roughly 2500 meters and they rise about 2 km above the deepest part of an ocean basin.

d is the correct answer

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft