Given that the specific heat of copper 0.385J/g∙K and that it takes 209.9J of energy to heat a sample of copper from 24.3°C to 49.9°C, find the mass of the copper

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.