Which action could be included in an accurate model of thermal convection in Earth's interior?A. Ridge formation where cold matter in the mantle is sinkingB. Seafloor spreading where convection currents meetC. Earthquakes where hotter matter is sinking beneath colder matterD. Subduction where tectonic plates are moving apart from one another

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

i believe the answer is 5,000

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.