, pub-7169657227878451 , DIRECT, f08c47fec0942fa0, pub-6403044094328716, DIRECT, f08c47fec0942fa0

Tagged: The noise

Stethoscope 0

The uses and laws of reflection of sound waves

The reflection The reflection is the change in the direction of a wavefront at a interface between two different media so that the wavefront returns into the medium from which it originated such as...

Sound waves 0

Nature and the properties of the sound waves

The sound The sound is an external factor that affects the ear causing the sense of hearing. and it produced due to the vibration of the bodies and it stops when the vibrating bodies...