Types of Energy
This type of energy is about movement of objects
Kinetic
Name the type of heat transfer that involves the heat source touching an object
Conduction
Which is faster: light or sound energy?
Light
Series or parallel: type of circuit that has only one possible pathway
Series circuit
What are the 2 main types of energy?
Kinetic and potential
This type of energy is stored in a slingshot
Elastic energy
Name the heat source that explains how the Sun heats the Earth
Radiation
How does sound travel?
Waves
Series or parallel: voltage is the same for all components (not shared)
Parallel circuits
Transfer or transformation: electric kettle boiling water
Transformation (electric to thermal)
This type of energy is increased when objects are raised up higher
Gravitational energy
What is the main type of heat transfer involved when using an oven?
Convection
What is the height of a sound wave called?
Amplitude
What are the 2 requirements for a circuit to work?
Power source and a complete path
Transfer or transformation: a billiard ball hitting into another billiard ball
Transfer
This type of energy can be classified as both kinetic or potential
Electrical energy
What unit is heat energy measured in?
Joules (J)
What does the wavelength of a sound wave change in the quality of the sound?
Pitch
What is the main benefit to using parallel circuits for strings of electrical lights (like Christmas lights)?
If one bulb breaks, the rest will continue working
State the Law of Conservation of Energy
Energy cannot be created or destroyed
This type of energy can be used to generate power, but is extremely dangerous if it not controlled safely (i.e. Hiroshima and Chernobyl)
Nuclear energy
In convection currents, what causes hot fluids to rise and cold fluids to sink?
Changes in density
Why do sounds travel faster in solids than in liquids or gases?
The vibrations are passed through solid objects due to higher density of particles
What unit is electrical resistance measured in?
Ohms (which means volts/ampere)
Calculate the energy efficiency: A light bulb has an input of 200J, and an output of 120J of light and 80J of heat.
60% efficient