GCSE Physics Specification

OCR B J259

Section P6.1: How does energy transform matter?

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#P6.1.1

a) define density

b) describe how to determine the densities of solid and liquid objects using measurements of length, mass and volume
PAG1

#P6.1.2

recall and apply the relationship between density, mass and volume to changes where mass is conserved:

density (kg/m3) = mass (kg) ÷ volume (m3)

#P6.1.3

describe the energy transfers involved when a system is changed by heating (in terms of temperature change and specific heat capacity)

#P6.1.4

define the term specific heat capacity and distinguish between it and the term specific latent heat

#P6.1.5

a) select and apply the relationship between change in internal energy of a material and its mass, specific heat capacity and temperature:

change in internal energy (J) = mass (kg) × specific heat capacity (J/kg°C) × change in temperature (°C)

b) explain how to safely use apparatus to determine the specific heat capacity of materials
PAG5

#P6.1.6

select and apply the relationship between energy needed to cause a change in state, specific latent heat and mass:

energy to cause a change of state (J) = mass (kg) × specific latent heat (J/kg)

#P6.1.7

describe all the changes involved in the way energy is stored when a system changes, and the temperature rises, for example: a moving object hitting an obstacle, an object slowing down, water brought to a boil in an electric kettle

#P6.1.8

make calculations of the energy transfers associated with changes in a system when the temperature changes, recalling or selecting the relevant equations for mechanical, electrical, and thermal processes