1. Heinrich Rohrer and Gerd Binnig were trying to solve the problem of seeing atoms directly. List the criteria and constraints of the problem they were trying to solve.

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.