Test 1

Question 1

Design

Answer 1

The process of translating an idea or market need into the detailed information from which a product can be made

Question 2

The three types of design

Answer 2

1-Original design: a completely new idea
2-Adaptive (developmental) design: evolution of a product
3-Variant design: change in size or shape without change in function

Question 3

Three stages of the design process

Answer 3

1-Conceptual design stage: considers all concepts and materials
2-Embodiment design stage: model and analyze samples
3-Detailed design stage: more precise data -> specs

Question 4

Index of performance

Answer 4

Engineering design tools, data (properties), and models

Question 5

Elastic modulus

Answer 5

Resistance to being deformed elastically

Question 6

Cubic unit cell

Answer 6

V = a^3

Question 7

Tetragonal unit cell

Answer 7

V = (a^2) c

Question 8

Hexagonal unit cell

Answer 8

V = (a^2) c sin(60)

Question 9

Trigonal unit cell

Answer 9

V = (a^2) c sin(60)

Question 10

Orthorhombic unit cell

Answer 10

V = abc

Question 11

Monoclinic unit cell

Answer 11

V = abc sin(β)

Question 12

1 inch = ? cm

Answer 12

1 inch = 2.54 cm

Question 13

1 kg = ? lbs

Answer 13

1 kg = 2.2 lbs

Question 14

Gas pycnometry

Answer 14

i) Pulverise until all closed porosity is gone, weigh -> Wsample
ii) Add He to gas pressure (Pg)
iii) Open valve -> He pressure equilibrates to P2g

Question 15

Archimedes method (D, S, M, T, B, A,P)

Answer 15

D: dry weight in air
S: suspended weight
M: fully saturated in air (moist!)
T: apparent specific gravity
B: bulk density
A: absorption
P: apparent (open!) porosity

Question 16

1 cal = ? J

Answer 16

1 cal = 4.184 J

Question 17

1 F = ? C

Answer 17

C = (5/9)*(F-32)

Question 18

Determinants of heat capacity

Answer 18

1: Vibrational and rotational energy
2: Energy level changes of electrons
3: Changing atomic positions

Question 19

Why is ρCp equal to ~ 3x10^6 J/(m^3)K at high temperatures?

Answer 19

At high temps, Cp is approximately equal to Cv.
Since…
Cp ≅ 3Nk

then at high temps,
ρCv ≅ 3Nk/NΩ, which simplifies to 3k/Ω

Ω varies little between atoms (less than a factor of 2 from 1.410^-29 m^3), so the equation equals approximately 310^-6 J/m^3K

Question 20

Debye Temperature

Answer 20

Temperature at which atoms reach their maximum vibrational frequency. Inflection of heat capacity curve is around this temperature

Question 21

Gruneisan Parameter

Answer 21

Parameter that describes the effect that changing volume has on heat capacity