Atomic structure
The model of the atom has been developed over the years as advances have been made in scientific methods and ...
Charge, current, voltage and energy
The three concepts of charge, current and voltage are all very closely linked. Here we will explore the way in ...
Classifying stars by colour
Stars can be classified according to their colour and a star’s colour is related to its surface temperature. The colours ...
Dangers of ionising radiation
Although ionising radiation can be very useful, it can also pose some very serious dangers. The generation of electricity using ...
Density and pressure
Density Density is a measurement of the amount of mass per volume of the substance. It is vital that you ...
Detecting ionising radiation
Photographic film Henri Becquerel was the scientist who discovered the effects of radioactivity. Becquerel was conducting experiments to investigate the ...
Distance, length, time and speed
Distance and length We will begin this unit by getting to grips with some mathematical calculations on distance, time and ...
Distance-time graphs
We have looked at the relationship between speed, distance and time, so now we can expand on these ideas using ...
Electrical charge
The creation of electrical charge is a fundamental part of electricity. Most electrical charge is produced due to the movement ...
Elastic and inelastic collisions
When objects collide, their momentum is converted into other forms of energy such as heat or sound. If this does ...
Electrical resistance
All components that have a circuit offer some resistance. This is because each component resists the flow of electricity to ...
Electricity wires
This part of the chapter focuses on the use of mains electricity. Electricity is used for many things that are ...
Electromagnetic induction
When a coil or a conductor is moved through a magnetic field a voltage is induced and current will flow. ...
Energy efficiency
Energy is used throughout our daily lives, in our homes, the buildings we work in and on our roads. This ...