Types of energy
Energy that has the ability to fall; this type of energy increases the higher up you go.
Gravitational potential energy
A type of circuit with more than one loop.
Parallel.
A light bulb is switched on.
Electrical energy --> Light energy + Heat energy
The most common form of wasted energy leading to inefficiency of appliances.
Heat energy
Heat transfer that occurs in liquids and gases.
Convection.
You can burn it or you can eat it.
Chemical potential energy.
A device that measures current.
Ammeter.
Chemical energy --> Sound energy
What is something you can do to make your home more energy efficient.
Buy better star rated appliances.
Turn off lights not in use, switch to CFL/LEDs.
Insulate your home.
Passive cooling.
Double glazing windows.
You burn your hand on the handle of a steel pot because of:
Conduction.
This type of energy is caused by vibrations.
Sound energy
The essential components of a circuit.
Power source, connected wires and a load
Filling up you car to drive around town.
Chemical energy --> Kinetic energy + Heat energy + Sound energy
A lawnmower has an input energy of 300J and a useful output energy of 150J. The energy efficiency is:
300/150 x 100% = 50%
Heat transfer that doesn't require particles.
Radiation.
A person falling from a plane has these types of energy. (2 types)
Kinetic energy and gravitational potential energy
Voltage is divided between components in this type of circuit.
Series.
A rollercoaster rolls from the highest point and comes to a rest at the bottom.
Gravitational potential energy --> Kinetic energy + Sound energy + Heat energy
The input energy to a lightbulb is 400J, the useful output energy is 60J. The efficiency is:
60/400 x 100% = 15%
A lava lamp has blobs that break off and rise to the top. This is an example of:
Convection.
An exploding firework has these types of energy. (4 types)
Kinetic energy, sound energy, light energy and heat energy.
If I am open, the light goes out.
Switch.
Charging your phone to watch a movie.
Electrical energy --> Chemical energy --> Electrical energy --> Light energy + Sound energy
A device has an input energy of 500J. 300J is converted to wasted energy. The efficiency is:
200/500 x 100% = 40%
A boulder heats up in the day due to ______, you sleep on that rock that night to keep warm due to _____.
Radiation, Conduction