Which of theses statements are true about the theory of plate tectonics and the theory of continental drift a) the theory of plate tectonics doesn't explain how continental movements could occur b) the theory of tectonics tells exactly where the continents were before pangaea divided c) the theory of plate tectonics proves the theory of continental drift completely wrong d) the theory of plate tectonics gives the method by which continents can move as part of plates

Asquare isothermal chip is of width w=5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at tinf=15 °c. from reliability considerations, the chip temperature must not exceed t=85 °c. if the coolant is air and the corresponding convection coefficient is h=200 w/m2 x k, what is the maximum allowable "power" of the chip? if the coolant is a liquid for which h=3000 w/m2 x k, what is the maximum allowable power of the chip?