Question

Which THREE energies travel on mechanical waves?


cooking food in a microwave oven


plucking a guitar string


waves in a pond after a pebble hits the pond’s surface


cellular phones communicating with other cellular phones


sound people hear from music that is playing from a nearby speaker

Answer 1

- Plucking a guitar string
- Waves in a pond after a pebble hits the pond’s surface
- Sound people hear from music playing from a nearby speaker

(Explanation: mechanical waves require a material medium and are vibrations of that medium. Microwaves and cell-phone signals are electromagnetic, not mechanical.)