Rocks formed from broken pieces of other rocks is classified as
a. foliated
b. extrusive
c. clastic
d. metamorphic

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 =

Properties seen when one one substance changes to another are known as properties

Could we see a galaxy that is 20 billion light-years away?