Answer:
The current theory of the structure of the Earth, called plate tectonics, tells us that the continents are in constant motion. Assume that the North American continent can be represented by a slab of rock 4850 km,on a side and 27 km deep and that the rock has an average mass density of 2790 kg/m3 . The continent is moving at the rate of about 3.8 cm/year. What is the mass of the continent
mass = 1.77 x 10²¹kg
Explanation:
the volume of the continent and then mass would be = Volume x density
Volume = (4.85 x 10⁶)²m x (27 x 10³)m
Mass = V x density
= (4.85 x 10⁶)² x (27 x 10³) x (2790)
= 1.77 x 10²¹kg
