How are sound waves caused?
Sound waves are caused by vibrating objects.
What is the National Grid?
The National Grid is bthe network of pylons and cables that covers the whole of Britain, these carry electricity t homes all over the country.
How do waves transfer energy?
Waves transfer energy from one place to another without transferring any matter.
What are the three wave properties?
Reflection, refraction and diffraction.
What are the uses of Infrared waves?
Infrared waves can be used for remote controls and optical fibres (used in phone lines).
What is gravitational force?
Gravitational force is the force of attraction between all masses.
Is weight and mass the same?
No, mass is just the amount of something in an object whereas weigth is caused by the pull of the gravitational force.
What is kinetic energy?
Kinetic energy is energy of movement, anything that moves has kinetic energy.
What is the formula for specific heat capacity?
E = m x SHC x theta
(Energy Transferred) (mass)
Name 2 types of non renewable energy
What is evaporation?
When water is converted from liquid form into vapour.
What is condensation?
When water changes from vapour or gas into a liquid. Condensation is responsible for the making of clouds.
What is the best emitter of heat?
Black Matt or Black Dull surfaces
What is a U Value?
A U value is how fast heat is transferred through a material
How does heat transfer through a solid?
What is the best absorber of infrared radiation?
Name both types of wave
Longitudinal and transverse
What happens to particles when they rise?
They become less dense
How does heat transfer work in a gas?
Which is more reliable underground cables or overground cables?
Underground cables are more reliable