The earth has a radius of 6.38 × 106 m and turns on its axis once every 23.9 h.

(a) what is the tangential speed (in m/s) of a person living in ecuador, a country that lies on the equator?

(b) at what latitude (i. e., the angle theta in the drawing) is the tangential speed one-third that of a person living in ecuador?

a) V = 465.9 m/s

b) θ = 70.529°

Explanation:

Let's first calculate angular velocity of earth:

Velocity of a person on Ecuador will be:

For part b, since angular velocity is the same:

Solving for θ:

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods