Phase diagrams
What does L stand for in a phase diagram
Liquid
What is the unit of electrical current?
Ampere
Mechanical advantage is defined as a measure of...
the force amplification achieved by using a tool or mechanical device
What is a prosthesis?
An artificial body part used to replace damaged structures
How many chickens does Ms McMillan have?
Three
What does alpha represent in a phase diagram?
Solid phase
What is the unit of resistance?
Ohm
You exert an effort force of 697 N downward and resulting load force 93 N. What is the mechanical advantage?
0.13
What is biocompatibility?
How well a material is accepted by the body without causing immune reaction.
What is Ms McMillan's favourite colour?
Green
What is the name used to describe the microscopic grains in an alloy
Microstructure
A circuit has a voltage of 12 V and resistance of 4 Ω. What is the current?
3 A
A platform is 1.5 metres off the ground, and the ramp is 6.0 metres long. What is the MA of this ramp?
MA = 4
What is an important material property in hip implants to prevent failure under load.
Tensile strength
What kind of engineer was Ms McMillan?
Mining engineer
What does complete solid solubility mean?
Complete solid solubility means copper (Cu) and nickel (Ni) can dissolve completely in each other in the solid state
A 24 V supply produces a current of 2 A. What is the resistance of the circuit?
12 Ω
A lever has a velocity ratio of 4. If the load moves 0.25 m, how far does the effort move?
1 m
Do natural polymers or synthetic polymers have a longer lifespan?
Synthetic
What is Ms McMillan's favourite mineral?
Olivine
What is the formula for the reverse lever rule?
WL=S/(R+S)
WL=(C∝-CO)/(C∝-CL)
Two 6 Ω resistors are connected in series to a 24 V supply. What is the total resistance and current in the circuit?
12 Ω and 2 A
A machine has a mechanical advantage of 3.6 and a velocity ratio of 4.5. What is its efficiency?
80%
A hip implant must withstand repeated loading while remaining safe inside the human body. Which TWO properties are most important when selecting a material for a hip implant, and why?
High wear resistance to reduce material loss from friction, and high biocompatibility so the material does not cause an adverse response in the body.
What NZ city was Ms McMillan born in?
Auckland