Materials

Question 1

Tera (T)

Answer 1

10¹²

Question 2

Giga (G)

Answer 2

10⁹

Question 3

Mega (M)

Answer 3

10⁶

Question 4

Kilo (k)

Answer 4

10³

Question 5

Centi (c)

Answer 5

10⁻²

Question 6

Milli (m)

Answer 6

10⁻³

Question 7

Micro (µ)

Answer 7

10⁻⁶

Question 8

Nano (n)

Answer 8

10⁻⁹

Question 9

Pico (p)

Answer 9

10⁻¹²

Question 10

Hooke’s law

Answer 10

Extention is directly proportional to force up to the limit of proportionality

Question 11

Elastic behavior

Answer 11

When the force is removed, it returns to the original shape

Question 12

Plastic behavior

Answer 12

Will not return to the original shape when the force is removed

Question 13

Elastic limit

Answer 13

Maximum extention before behavior becomes plastic

Question 14

Effect of two springs in series

Answer 14

• Extention doubles
• Spring constant halves

Question 15

Effects of two springs in parrallel

Answer 15

• Extention halves
• Spring constant doubles

Question 16

What is a brittle material?

Answer 16

• No/very little plastic region before it breaks
• Small strain

Question 17

What is a ductile material?

Answer 17

• Very large plastic region
• Large strain

Question 18

What is a stiff material?

Answer 18

• Very small extention when a load is put on it
• High Youngs modulus

Question 19

What is a strong material?

Answer 19

• High ultimate tensile stress

Question 20

What are the 6 base units?

Answer 20

Kg (kilograms)
m (meters)
s (secconds)
A (amps)
K (kelvin)
mol (mol)

Question 21

Femto (f)

Answer 21

10⁻¹⁵

Question 22

Density

Answer 22

Mass per unit volume

Question 23

How do you calculate the work done/energy stored on a force-extension graph?

Answer 23

Area under the graph

Question 24

How do you calculate the spring constant on a force-extension graph?

Answer 24

The gradient

Question 25

Tensile stress

Answer 25

The ratio of the load to the cross-sectional area when stretching a material.

Question 26

Tensile strain

Answer 26

The ratio of extension to original length

Question 27

Young's Modulus

Answer 27

The ratio of tensile stress to tensile strain in the Hooke's law region.

Question 28

Unit of Young's Modulus

Answer 28

Pascals (Pa)

Question 29

Unit of tensile stress

Answer 29

Nm⁻² or Pa

Question 30

Unit of tensile strain

Answer 30

NO UNITS