Question

Tectonic plates are large segments of the Earth's crust that move slowly. Suppose one such plate has an average speed of 3.8 cm per year.

(a) What distance does it move in 60 seconds at this speed?

(b) What is its speed in miles per million years?

Answer 1

Given data, average speed, Yo = 3.8 cm/ year. Time, t= to see Distance travelled, th distance travelled d = Voxt 3.8 cm d= I year x (60 See) Х loocm Bal3600X365-25_{Beel year de 3.8 X 1 X 1 X 60 100 x 365-25 X3620 d = 1:734 x/0-6 mi to speel in miles per million you 10 км Yous x X year lo I million * Km V = 4 cm 5cm = 38 milion years 1 km = 0.621 mile 38 x 0.621 miles million yous. V V = 23.60 miles million years