describe, with examples, the process by which energy is dissipated, so that it is stored in less useful ways
describe, with examples, the process by which energy is dissipated, so that it is stored in less useful ways
describe how, in different domestic devices, energy is transferred from batteries or the a.c. from the mains
how energy may be wasted in the transfer to and within motors and heating devices
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
calculate energy efficiency for any energy transfer
describe ways to increase efficiency
explain ways of reducing unwanted energy transfer
lubrication and thermal insulation
describe how the rate of cooling of a building is affected by the thickness and thermal conductivity of its walls (qualitative only)