Spec J249
Revise OCR GCSE Physics 7.1.4 Quantifying energy transfers in a system with the question bank and revision guides.
make 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; Practical (PAG P5 Energy): use a joulemeter to measure the energy used by different electrical appliances.
