An AC supply of electricity has a time period of 0.08s. What is the frequency?

What are the three wires in the three pin plug? What does each one do?

How do the fuse and the earth wire work together?

How does an RCCB work?

What are the relative masses and charge of the 3 basic subatomic particles?

What is an alpha particle?

What is a beta particle?

What is a gamma ray?

List two places where background radiation is increased

What occupations have an increased risk of exposure to radiation?

What is the definition of half life?

Give an example of how gamma radiation can be used in medicine

What materials can stop alpha, beta and gamma rays?

What is the main environmental problem associated with nuclear power?

Give the main stages of the life cycle of a star around THE SAME size of our sun

Give the main stages of the life cycle of a star much BIGGER than our sun