Given that an atom of a semiconductor has a diameter of 2.18 å , what is the maximum number of moles that fit in the channel of a processor chip that is 63.6 nm long, 74.2 nm , wide and 275 nm thick? assume that the atoms stack in a simple cubic arrangement.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?