Energy

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Sample objectives

What this unit covers

• Energy changes in a system, and the ways energy is stored before and after such changes: Rearrange power equations to calculate energy transferred, work done or time.
• Energy changes in a system, and the ways energy is stored before and after such changes: Define power as the rate at which energy is transferred.
• Energy changes in a system, and the ways energy is stored before and after such changes: Rearrange energy equations to find mass, speed, spring constant, extension, gravitational field strength or height where appropriate.
• Energy changes in a system, and the ways energy is stored before and after such changes: Calculate elastic potential energy stored in a stretched spring within its limit of proportionality.
• Energy changes in a system, and the ways energy is stored before and after such changes: Calculate the change in thermal energy when the temperature of a system changes.
• Energy changes in a system, and the ways energy is stored before and after such changes: Identify change in thermal energy in joules, mass in kilograms, specific heat capacity in joules per kilogram per degree Celsius and temperature change in degrees Celsius.
• Energy changes in a system, and the ways energy is stored before and after such changes: Use calculations to compare how energy is redistributed in a system on a common scale.
• Energy changes in a system, and the ways energy is stored before and after such changes: Link electrical work done and current flow to energy transfers in circuits.
• Conservation and dissipation of energy: Identify apparatus and techniques used in thermal insulation practical work.
• Conservation and dissipation of energy: Describe examples of energy transfers in a closed system with no net change to total energy.
• Conservation and dissipation of energy: Calculate efficiency using useful energy output divided by total energy input.
• Conservation and dissipation of energy: Identify useful and wasted energy transfers in a device or process.
• National and global energy resources: Interpret data showing the use of different energy resources.
• National and global energy resources: Explain patterns and trends in energy-resource use from data.
• National and global energy resources: Describe environmental impacts that arise from using nuclear fuel.
• National and global energy resources: Discuss social factors that affect energy-resource decisions.