Physics, 02.07.2019 08:00 jordan2875
The current theory of the structure of the earth, called plate tectonics, tells us what the continents are in constant motion. assume that the north american continent can be represented by a slab of rock 4700km on a side and 37km deep and that the rock has an average mass density of 2720kg/m^3. the continent is moving at the rate of about 4.6cm/year. a) what is the mass of the continent. b) what is the kinetic energy of the continent?
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