The circuit above contains 5 resistors (r1, r2, ra, rb, rc) with equal resistance r. write an equation for the current i2 in terms of the current i1. ( when entering your answer, use i1 for i1,

e. g.,the answer 0.5*i1 has the correct syntax) i2 =

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

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 =