Tres personas tiran hacia la derecha con fuerzas de 256N, 287N Y 302N respectivamente para arrastrar una caja. La caja ejerce una fuerza de atracción sobre el piso de 422N. ¿Cuál es la fuerza efectiva con la que las 3 personas logran arrastrar la caja?

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

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 =

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?