Physics 4b
It is the radiation that is all around us
What is background radiation?
They both has a mass of 1
What are protons and neutrons
The change from solid to a gas
What is sublimation?
Allows current to flow in one direction only
What is a diode?
An object of group of objects
What is a system?
A radioactive chemical injected into a person
What is a tracer?
1 x 10-10m
What is the radius of an atom?
They are free to move within a given volume?
What are the particles like in a liquid?
Resistance decreases with increasing temperature
What is a thermistor?
An energy resource that can be replenished
What is renewable?
The type of radiation used to treat cancer from outside the body
What is gamma?
James Chadwick
Who discovered the neutron?
Mass / Volume
What is density?
Resistance decreases with increasing brightness
What is an LDR?
A joule per second
What is a watt?
What are fission and fusion?
A helium nucleus
What is an alpha particle?
Kinetic + Potential
What is internal energy?
50Hz
What is the frequency of the mains?
Lubrication and insulation
How do we reduce unwanted energy transfers?
The nucleus produced when two hydrogens fuse together
What is helium?
The mass number stays the same but the proton number increase by 1
What happens when a beta particle is emitted?
The amount of energy needed to boil 1Kg of a liquid
What is specific latent heat of vapourisation?
It increases the potential difference before being transported around the country
What is a step up transformer?
When produced by burning fuels it causes the greenhouse effect that leads to global warming.
Carbon dioxide