What this topic covers
Energy has 3 subtopics:
- Energy changes in a system, and the ways energy is stored before and after such changes
- Conservation and dissipation of energy
- National and global energy resources
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GCSE AQA Higher Combined Science Physics · Topic 1 of 8
Energy – GCSE AQA Higher Combined Science Physics revision notes
Choose a subtopic. Energy covers Energy changes in a system, and the ways energy is stored before and after such changes, Conservation and dissipation of energy, and National and global energy resources in GCSE AQA Higher Combined Science Physics. 14 lessons in 3 subtopics.
Revise Energy for GCSE AQA Higher Combined Science Physics, including Energy changes in a system, and the ways energy is stored before and after such changes.
14
Lessons
3
Subtopics
Energy lessons by subtopic
14 lessons, grouped by subtopic.
Energy changes in a system, and the ways energy is stored before and after such changes
- Understanding Power
- Calculating Power
- Kinetic Energy Calculations
- Elastic Potential Energy Calculations
- Gravitational Potential Energy Calculations
- Specific Heat Capacity Explained
- Energy Stores & Systems: Introduction
- Energy Transfer Examples
Conservation and dissipation of energy
- Energy Transfer and Conservation
- Reducing Unwanted Energy Transfers
- Calculating Efficiency
- Increasing Efficiency
National and global energy resources
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Frequently asked questions
What is Energy?
Energy covers Energy changes in a system, and the ways energy is stored before and after such changes, Conservation and dissipation of energy, and National and global energy resources in GCSE AQA Higher Combined Science Physics. 14 lessons in 3 subtopics.
What are the energy stores in physics?
The main energy stores at GCSE are kinetic, thermal, chemical, gravitational potential, elastic potential, magnetic, electrostatic and nuclear. The Energy Stores & Systems: Introduction notes cover this in full.
What is an energy store?
An energy store is where energy is held in an object or system, because energy is always stored somewhere. The Energy Stores & Systems: Introduction notes cover this in full.
What is the formula for kinetic energy?
The kinetic energy formula is Ek = ½mv², where m is mass in kg, v is speed in m/s and kinetic energy is in joules (J). The Kinetic Energy Calculations notes cover this in full.
What is the specific heat capacity equation?
The specific heat capacity equation is ΔE = mcΔθ, where ΔE is the change in thermal energy in joules, m is mass in kg, c is specific heat capacity in J/kg°C and Δθ is the temperature change in °C. The Specific Heat Capacity Explained notes cover this in full.
What is the equation for power?
The power equations are P = E/t and P = W/t: power equals energy transferred, or work done, divided by time. The Calculating Power notes cover this in full.
What is the formula for elastic potential energy?
The elastic potential energy formula is Ee = ½ke², where k is the spring constant in N/m, e is the extension in metres and energy is in joules (J). The Elastic Potential Energy Calculations notes cover this in full.
What is the specific heat capacity of water?
The specific heat capacity of water is 4200 J/kg°C, which is very high. The Specific Heat Capacity Explained notes cover this in full.
What is the formula for gravitational potential energy?
The gravitational potential energy formula is Ep = mgh, where m is mass in kg, g is gravitational field strength in N/kg and h is height in metres. The Gravitational Potential Energy Calculations notes cover this in full.