The radius of a potassium atom is 0.227 nanometer (nm). what is this radius in centimeters (cm)? a. 2.27 ã 10â8 cm b. 2.27 ã 106 cm c. 2.27 ã 10â10 cm d. 2.27 ã 10â11 cm check answer

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

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 =