Plz

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 5850 km

on a side and 35 km deep and that the rock

has an average mass density of 2750 kg/m3

.

the continent is moving at the rate of about

3.2 cm/year.

what is the mass of the continent?

answer in units of kg.

005 (part 2 of 3) 10.0 points

what is the kinetic energy of the continent?

answer in units of j.

006 (part 3 of 3) 10.0 points

a jogger (of mass 78 kg) has the same kinetic

energy as that of the continent.

what would his speed be?

answer in units of m/s.

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.