Reaction times after alcohol Simulation Play

Reactions of nucleophiles: nucleophilic addition and addition-elimination Simulation Play

Reactions of oxides with water Simulation Play

Reactions of thionyl chloride Simulation Play

Reactivity of halogens Simulation Play

Reading out from the graph the  x- and  y-intercepts of a linear function Simulation Play

Reading speed from the graph Simulation Play

Real and apparent positions Simulation Play

Recognising oxidising agents Simulation Play

Recognising reducing agents Simulation Play

Recoil Simulation Play

Redox reaction Simulation Play

Reducing pollution from combustion Simulation Play

Refraction of plane waves Simulation Play

Regular polygons Simulation Play

Regular polygons – the dodecagon Simulation Play

Regular polygons – the equilateral triangle Simulation Play

Regular polygons – the octagon Simulation Play

Regular polygons – the square Simulation Play

Regulation of body temperature Simulation Play

Regulation of carbon dioxide concentration by plants Simulation Play

Regulation of the amount of light entering the eye Simulation Play

Regulation of water balance in human Simulation Play

Relationship between electromagnetic force and the position of the conductor Simulation Play

Relationship between photosynthesis and plant respiration Simulation Play

Relativistic momentum Simulation Play

Remember another way to express concentration Simulation Play

Renal filtration Simulation Play

Resistance of coil Simulation Play

Resonance Simulation Play