On what does the period of a ball pendulum depend? Whiteboard exercise Play

Orbital velocity Animation Play

Orbits and gravity Student activity Play

Organism's adaptation to long-time effort Slideshow Play

Other physical properties of alkanes Student activity Play

Parapatric speciation in the mole rat Slideshow Play

Partial pressure and molar fraction Student activity Play

Partial pressure and molar fraction Whiteboard exercise Play

Passage to a different medium Student activity Play

Passage to a different medium Simulation Play

Percentage composition of compounds Student activity Play

Percentage composition of compounds Student activity Play

Periodic trends Student activity Play

Permeability and absorption of X-rays Student activity Play

pH and the concentration of hydrogen ions Animation 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

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 haloalkanes Animation Play