Energy
An object held above the ground has what type of energy?
Gravitational Potential Energy
Hot air rising is an example of which heat transfer process...
Convection
What is the name of the diagram that illustrates the energy efficiency of a device?
Sankey Diagram
Which roof colour absorbs the most sunlight?
Black/ Dark coloured roofs
Which type of circuit has multiple branches?
Parallel Circuit
What device demonstrates the transfer of energy using swinging spheres?
A Newton's Cradle
Heat transferring between objects (or molecules) that are touching each other is known as..
Conduction
In energy efficiency diagrams, what does a downwards arrow represent?
Wasted Energy
Name one design feature of Queenslander homes that improves their energy efficiency.
Verandahs, Raised flooring, High Ceilings, Timber Walls
Current is defined as ....
the rate of flow of electrons in an electric circuit
Energy is measured in ....
Joules (J)
A spoon warming up in a cup of hot coffee is an example of....
Conduction
A lightbulb has a total energy input of 80J and produces 35J of wasted heat energy. How much light energy is produced?
45J
Energy consumption is measured in...
Kilowatt Hours (kWh)
The current is the same across all components in a...
Series Circuit
Name 3 types of Kinetic energy
Light, Sound, Thermal, Movement
Which heat transfer process involves electromagnetic waves?
Radiation
Define Energy Efficiency
The amount of useful output energy produced from the total input
If a material has good thermal mass, it....
Absorbs heat during the day and releases it at night.
What happens when an extra bulb is added to a series circuit?
The bulbs will dim.
What is a Rube Goldberg machine?
A complex machine that performs a simple task
OR
A machine that performs a simple task in a complicated way.
Convection in liquids- Why do hot water molecules rise and cold water molecules sink?
It's due to density. The cold molecules are denser than the hot ones.
A fan uses a total of 120 joules of electrical energy, produces 30 joules of kinetic energy and 90 joules of sound energy. How efficient is this device? (in a percentage)
25%
Define Passive Solar Design?
Passive Solar design uses the sun’s energy to heat and cool homes without using electricity or machines.
E.g - orientating the home in a certain way, placing windows on certain sides of the house.
What is Ohm's Law?
(will accept varying answers)
(you may write on the board)
Lists 3 equations:
V= I x R
I= V/R
R= V/I
-or describes triangle rule
-or describes that:
more voltage = more current
more resistance = less current