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Waves in matter
Revision and exam practice for Waves in matter.
12
Objectives
10
Flashcards
10
Questions
88 min
Study time
OcrGcseCombined Science A GatewayWaves in matter
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12 objective pages available
Energy Conservation in Closed Systems1 objectives
- Communicate the key features of for situations where there are energy transfers in a system, that there is no net change to the total energy of a closed system (qualitative only).
Understanding Energy Changes in Systems1 objectives
- Communicate the key features of all the changes involved in the way energy is stored when a system changes for common situations.
Energy Changes in a System1 objectives
- Communicate the key features of the changes in energy involved when a system is changed by heating (in terms of temperature change and specific heat capacity), by work done by forces, and by work done when a current flows.
Calculating Energy Changes in Systems1 objectives
- Develop knowledge and skill in calculations of the energy changes associated with changes in a system, recalling or selecting the relevant equations for mechanical, electrical, and thermal processes; thereby express in quantitative form and on a common scale the overall redistribution of energy in the system.
Understanding Energy Types: Kinetic, Gravitational Potential, and Elastic Potential1 objectives
- Work out the amounts of energy associated with a moving body, a stretched spring and an object raised above ground level.
Energy Dissipation: The Loss of Useful Energy1 objectives
- Develop secure knowledge and application of describe, with examples, the process by which energy is dissipated, so that it is stored in less useful ways
Energy Transfer in Domestic Devices: Batteries vs. Mains1 objectives
- Communicate the key features of how, in different domestic devices, energy is transferred from batteries or the a.c. from the mains.
Power Ratings, Energy Transfer, and Domestic Appliances1 objectives
- Develop secure knowledge and application of describe, with examples, the relationship between the power ratings for domestic electrical appliances and how this is linked to the changes in stored energy when they are in use
Understanding Energy Efficiency1 objectives
- Work out energy efficiency for any energy transfer.
Increasing Efficiency in Systems (Higher)1 objectives
- Communicate the key features of ways to increase efficiency.
Reducing Unwanted Energy Transfer1 objectives
- Account for ways of reducing unwanted energy transfer.
Factors Affecting Cooling Rate: Thickness and Thermal Conductivity1 objectives
- Communicate the key features of the way the rate of cooling is effected by the thickness and thermal conductivity of its walls (qualitative only).
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Practice preview
- An electric toaster converts electrical energy into which primary useful form of energy?
- A portable radio uses batteries. How is energy transferred from the batteries to the radio?
- When a friction brake is applied on a bicycle, which energy transformation primarily represents dissipation?
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