Demand for energy Slideshow Play

Democritus's atomic theory Animation Play

Deriving the expression for free energy change Animation Play

Determination of enthalpy change in combustion reactions Whiteboard exercise Play

Determination of enthalpy change in combustion reactions (1) Student activity Play

Determination of enthalpy change in combustion reactions (2) Student activity Play

Determining standard enthalpies of reaction Whiteboard exercise Play

Determining the mean bond enthalpy for polyatomic molecules Animation Play

Development - energy Slideshow Play

Development - waste Slideshow Play

Different forms of energy Simulation Play

Different magnitudes of forces Animation Play

Different types of chemical energy Slideshow Play

Different types of energy Animation Play

Diffraction and interference of mechanical waves Class activity Play

Diffraction and interference of mechanical waves Whiteboard presentation Play

Diffraction and interference of mechanical waves Whiteboard presentation Play

Diffraction and interference of mechanical waves Class activity Play

Diffraction of electrons – the Davisson-Germer experiment Student activity Play

Dioxins Student activity Play

Discharging a battery. Accumulators. Whiteboard exercise Play

Discharging a battery. Accumulators. Student activity Play

Discovery of elementary particles Whiteboard exercise Play

Discovery of elementary particles Student activity Play

Dissolving ionic compounds in water Student activity Play