The air rushes along the straw and around the bend. As the straw pushes on the air to force it round the corner, the air...
As the air rushes out it pushes back on the balloon propelling it forward.
As the water shoots out it pushes back on the carton with an equal force. Because the holes are off-centre this force makes it...
Clymwch y llinyn o naill ben yr ystafell i'r llall. Nawr, tynnwch y peg i ffwrdd. Wrth i'r aer ruthro allan, mae'n gwthio'n ôl...
Recognising and celebrating outstanding contributions to the field of physics education.