there are 92 naturally occuring elements
Answer:
The particles of the medium just vibrate in place.
Explanation:
As they vibrate, they pass the energy of the disturbance to the particles next to them, which pass the energy to the particles next to them, and so on. Particles of the medium don't actually travel along with the wave.
Air is a mixture, Its constituens can be seperated
Answer:
chemical change
Explanation:
chemical change requires energy in the form of heat or electricity.
