The cause of the Challenger space shuttle disaster was that the seals had not been tested at extremely low temperatures, so some of the seals failed. This is a problem with the step (perform tests on the prototype/testing) in the engineering design process.

Which function of nonverbal communication is at work? trey was planning a surprise party for lynn, but when she asked him why they couldn't go out on friday, trey shifted his eyes, coughed, and stuttered when he said he already had plans. what did trey's nonverbal communication do for lynn? clarify the relationship regulate the interaction increase persuasive power reveal discrepancies manage impressions