Is material medium required for sound waves propagation??? Give examples

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

What occurs during a combustion reaction

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island