Section 2 - Continued

Question 1

Examples of modern materials?

Answer 1

Concrete, aluminium, steel, graphene

Question 2

What are nanomaterials?

Answer 2

Tiny particles of 1 ot 100 nanometres

Question 3

What are thermochromic pigments?

Answer 3

Change colour when their temperature changes

Question 4

What are photochromic pigments?

Answer 4

Pigments change their properties when exposed to ultraviolet light

Question 5

What is Quantum-tunneling composite?

Answer 5

Insulating rubbler containing tiny particles of metal. When squashed, metal particles meet and allow the flow of electrical current.

Question 6

What are composite materials?

Answer 6

Material that are made up of different materials, which are combined to improve their properties. Eg: Concrete

Question 7

What are particle based composites?

Answer 7

Made with small particles of material. Mixes smaller particles of sand with larger particles of cement

Question 8

What are microcontrollers?

Answer 8

Provide functionality and can be programmed to perform different processing functions

Question 9

What is reciprocating motion?

Answer 9

Repeated up and down motion or back and fourth motion

Question 10

Formula for mechanical advantage?

Answer 10

Mechanical advantage = load(N) / effort (N)