Chapter 1

Question 1

mechanical properties

Answer 1

stiffnes, strength ductility

Question 2

physical properties

Answer 2

conductivity, density

Question 3

chemical properties

Answer 3

corrosion

Question 4

manufacturing properties

Answer 4

machinability, ease of joining, formability

Question 5

microstructure

Answer 5

grain size and shape, needs magnification

Question 6

macrostructure

Answer 6

visible to naked eye

Question 7

nanostructure

Answer 7

less than 100nm, groups of atoms (particles)

Question 8

metals

Answer 8

dense, stiff, strong, ductile, good thermal and electrical conductors

Question 9

ceramics

Answer 9

combo of metal and non-metal, great insulators, strong, hard, abrasion resistant, brittle

Question 10

polymers

Answer 10

low density, degrades under UV

Question 11

composites

Answer 11

combo of metal, ceramic and polymer to fulfill specific design needs

Question 12

atomic number

Answer 12

z = protons in nucleus

Question 13

atomic mass

Answer 13

a = z + N = protons + neutrons

Question 14

atomic weight

Answer 14

weighted average of all element’s isotope weights

Question 15

electropositive

Answer 15

likely to give up valence electrons and become positive (metals)

Question 16

area of circle

Answer 16

pi r^2

Question 17

volume of sphere

Answer 17

4pir^3/3

Question 18

surface area of sphere

Answer 18

4pir^2

Question 19

kg to lbs

Answer 19

1 kg = 2.2046lbs