Permeability and absorption of X-rays Student activity Play

Perpendicular distance from a point to a line Animation Play

Perpendicular distance from a point to a line Class activity Play

Perpendicular distance from a point to a line Student activity Play

Perpendicular distance from a point to a line Whiteboard presentation Play

Perpendicular lines Student activity Play

Perpendicular lines Whiteboard exercise Play

pH and the concentration of hydrogen ions Animation Play

pH curves for the titration of strong acids and strong bases Animation Play

pH curves for the titration of weak acids and bases Animation Play

pH curves with two equivalence points Illustration Play

pH curves with two equivalence points Student activity Play

pH of buffer solutions Student activity Play

pH of buffer solutions Whiteboard exercise Play

pH of strong acids Whiteboard exercise Play

pH of strong acids Student activity Play

pH of strong bases Student activity Play

pH range for colour change of an indicator Animation Play

Phase changes Class activity Play

Phase changes Whiteboard presentation Play

Physical changes and mass Simulation Play

Physical changes and mass Student activity Play

Physical changes of three different substances Whiteboard exercise Play

Physical effort and our body Whiteboard exercise Play

Physical properties of aldehydes and ketones – the boiling point Student activity Play