Chapter 2 Flashcards
What are fossil fuels?
It is a fuel formed by natural processes
What are renewable alternatives to fossil fuels?
Wind Solar Power Tidal Biomass Hydroelectric
What is good about wind power?
It is renewable
It is reliable
It can generate lots of energy
What is bad about wind power?
It is expensive to make and service
It is loud, so resident will most likely complain against these
Birds can die due to these and they cannot see them and if they go in they will get chopped
What are the advantages of coal?
There is a lot of it on the earth which can last up to 100 years
It produces large amounts of energy
What are the disadvantages of coal?
It produces carbon dioxide which contributes to global warming
Damage is caused to the land when mining takes place
What are biofuel and biomass created from?
They are created from organic matter which is burned to generate power
What are some examples of biomass fuels?
Food, Farm waste, Compost
What are photovoltaic cells?
They convert light energy into electric current
What are biofuel and biomass created from?
They are created from organic matter which is burned to generate power
What are some examples of biomass fuels?
food, farm waste, compost
Where does 11% of the world’s electricity come from?
Nuclear Power
What are the different types of potential energy?
Chemical Energy
Mechanical Energy
Nuclear Energy
What are the different types of mechanical storages?
Compression
Tension
Motion
Which non-stick modern material is used to coat some kitchen equipment?
Teflon
What does biodegradable mean?
Broken down by water, oxygen, sunlight, bacteria etc…
What is polycaprolactone?
It is is a low temperature hand-mouldable polymer
What is Flexible MDF?
It allows for the creation of natural curves
What are the good things about Titanium?
It is
- light weight
- tough
- stiff
- has a low density
- Doesn’t react with the human body
- It is used for broke bones
What are the good things about LCD? (Liquid Crystal Display)
The screens can be small and lightweight
LCDs do not emit light, so they require black lighting
They have very low power consumption
How do self healing polymers heal?
They react to stress fractures by releasing a resin into the new crack
What is a thermochemistry pigment?
A pigment that changes according to temperature
What is a composite materials?
Something made up of 2 or more materials
What does synergy mean?
When 2 or more materials make a better material together
What is concrete made from?
Sement, sand and water
What is GRP and give examples of it?
It means glass reinforced plastic and some examples are , windows and in sports cars
What is CRP and give examples of it?
It means carbon fibre reinforced plastic and an example of it is diamond
What does detaminate mean?
When the layers come apart
What does VOC mean and give some reasons why it is bad?
Volatile Organic Compound
It stings
It is not good for a out health
It is not good for the planet
What does weatherproofing mean?
Making an object or structure waterproof
What is Gore-tex?
It is a waterproof material that only lets water vapour through and not water
What is aramid?
Particularly tough fibres made denim modified polyamide
What is QTC?
It is a polymer that contains billions of metal particles that don’t touch each other
What does PPE mean?
Personal Protective Equipment
What is an open loop system?
It is a system that has no feedback and is unable to make a decision
What is a closed loop system?
It is a system that is able a decision using feedback, usually from a sensor
What is keviar?
It is a heat resistant and strong synthetic fiber
What is microencapsulation?
Solids, Liquids or gasses are sealed in tiny capsules
Good things with microcontroller ICs?
These programmable ICs are very adaptable
They can be programmed to perform multiple processes
Reduces the amount of components needed to perform a task
What does it mean when an object is moving in a reciprocating motion?
Moving back and forth
What does it mean when an object is oscillating?
Swinging on a curve
What does it mean when an object is moving in a linear direction
In a straight line
What does it mean when an object is moving in a rotary motion?
Moving in a circle
What are the 4 different types of cams?
Eccentric Cam
Heart Shaped Cam
Snail Cam
Pear Cam
