Answer:
Explained
Explanation:
Mechanical waves such as sound waves are created when a source of energy causes a medium to vibrate.
Energy vibrating a medium produces a energy wave that are mechanical in nature , which means that they require a medium through which they travel.
Mechanical waves are of two types
1. Transverse, in which crests and troughs are up and down.
2. Longitudinal, with compressions and rarefraction.
