Timed! i would really appreciate some help! will try to mark brainliest!!! For her birthday, Samantha gets a new bike. She wants all her friends to see and so begins riding up and down her street. What is her speed if she goes 40.5m in 8.6s? *

4.71 m/s
4.71 h/m
47.1 h/m

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 =