4.2 according to quantum mechanics, the electron cloud for a hydrogen atom in the ground state has a charge density rho(r)= q e−2r/a, πa3 where q is the charge of the electron and a is the bohr radius. find the atomic polarizability of such an atom. [hint: first calculate the electric field of the electron cloud, ee(r); then expand the exponential, assuming r ≪ a.1

Match each topic to the audience who would be most receptive to the topic. the audience is stay-at-home moms who are 30 to 40 years old. they are college-educated women who live in the suburbs. the audience is a group of male college students getting ready to graduate from college. they attend a large university in a big city. the audience is blue-collar workers who are 30 to 50 years old. they work in the steel industry in a small, rural community. the audience is retired men and women who are 70 to 80 years old. they live in a retirement community, and many of them have several grandchildren who live far away. the audience is a group of students getting ready to sign up for seventh-grade classes. they come from a wide range of intellectual levels, but many of the students travel extensively with their families. using a social networking website to connect with friends and family arrowright advantages of joining a labor union arrowright home schooling reform arrowright how to prepare for a job interview arrowright the importance of studying a foreign language arrowright reset

Hoy trabajo mi hermana porque ella está enferma. por para

La lengua de los inca y de muchos peruanos indígenas es a. el español c. b. el inca d. el quechua el ande