Expresar el vector A = ( -18; 25 ) mB = ( 50 km ; SO ) C = ( 23 m/s ; 1520 ) D = ( 12 i +20j ) km E = 65 km/h ( 0,376 I + mj) en los diferentes sistemas de coordenadas: a. Coordenadas polares b. En función de sus vectores base c. Coordenadas geográficas d. En función de su módulo y unitario

What are similarities and differences of reflection, refraction, diffraction and absorption?

Ms.hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =