We have just published a NEW physics course covering energy stores, energy transfers, specific heat capacity, power and more. This course is suitable for both combined science and triple science students. Teachers will also find this course helpful if you’re getting to grips with the difference between energy stores and energy transfers.
Energy Stores and Energy Transfers
In a move to link how teachers explain energy and how lecturers at university demonstrate energy teachers now must explicitly refer to energy stores and energy transfers. We have included a brief breakdown below.
- Heat energy, also known as thermal or internal energy, is the result of the movement of tiny particles in solids, liquids and gases.
- Magnetic energy is the energy found in magnets.
- Kinetic energy is the energy a moving object has.
- Gravitational potential energy is the energy stored in an object at height.
- Chemical energy is the stored energy in the bonds of a molecule.
- Electrostatic energy is the energy found in moving or static electrical charges
- Elastic potential energy is the energy stored in stretched or squashed objects.
- Nuclear energy is found stored in the nuclei of atoms.
Energy is moved or transferred from one store to another using one of the following four transfers:
- Mechanical work occurs when a force acts on an abject.
- Electrical work transfers energy by the movement of charges.
- Heating transfers occur when there is a difference in temperature.
- Radiation transfers energy through waves e.g. light, ultraviolet or sound.
For more on this topic check out our lesson here.
Specific Heat Capacity
Another key topic in this course is specific heat capacity. The specific heat capacity of a substance is the amount of energy required to raise the temperature of one kilogram of that substance by one degree Celsius. We can use the equation:
Change in thermal energy = mass x specific heat capacity x temperature change.
Students will be given this equation in their exam however they need to be confident at using it. Our lesson will give students worked examples and lots of questions to practise.
We hope you enjoy our new course on Energy.