Which of the following epidermal cells are the sensory receptors for touch? langerhans cells melanocytes keratinocytes merkel cells

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Most short-period comets do not have randomly oriented orbits because