If V_ab is the potential difference across the resistive coil of resistance R, Pis the power input to the coil, E is the energy required to boil a cup of water, and t is the time needed to heat a cup of water using the electric device, which of the following quantities are known in this problem?a. tb. Rc. Vabd. Rinte. Ef. Ig. Ph. E

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 =