To any one who, for the first time, sees a great stretch of sandy shore covered with innumerable ridges and furrows, as if combed with a giant comb, a dozen questions must immediately present ...

A ripple tank can be used to measure and calculate frequency, wavelength and the speed of waves on the surface of the water. A ripple tank is a transparent shallow tray of water with a light shining ...

Science teachers are doing fewer practical experiments because of the demands of the curriculum, tests and badly behaved pupils, a poll suggests. Online research among 1,300 teachers by the government ...