ROAR Book: To Engineer Is Human

5-4-3-2-1

5.Comments:

• I did not know that now if a structural failure occurs it is caused by technological frontiers in the new industrial world.
• Cracks in a structure can cause it to collapse no matter what the size is.Wow!!!
• I did not know the failure of the Liberty Bell was a spontaneous.
• It is a good thing that you can seal/close a crack in a structure.
• I did not know the Liberty Bell was made in England in 1752; I thought it was made in New York.

4.Questions:

• What is a microscopic crack?
• What is a "nuleation site"?
• Where was the Nuclear Regulatory Commission located?
• How much copper content did the inexperienced Americans decide to increase?

3.Vocabulary:

• Vicissitudes: a change or variation occurring in the course of something
• Propagation: transmission or dissemination
• Metallurgical: the technique or science of working or heating metals so as to give them certain desired shapes or properties

2.Literary Terms:

• Metaphor: "It is difficult to say whether a century year old bridge was over-designed or how much a lightened the frames of forty-year-old buses could have been." (page 121)
• Simile: "Nevertheless the sophisticated structure of modern engineering is,like the simple chain of antiquity." (page 119)

1.Overview Sentence:

• Describes why some structures may collapse due to cracks and describes how you can seal a crack to prevent a structural failure.