Question

sound is used.
To join plastic surfaces together
(a) audible
(b) Infra-sonic
(e) ultrasonic
(d) reverberated​

Answer 1

Answer:

e) ultrasonic

Explanation:

Ultrasonic welding is an industrial technique whereby high-frequency ultrasonic acoustic vibrations are locally applied to workpieces being held together under pressure to create a solid-state weld. It is commonly used for plastics and metals, and especially for joining dissimilar materials

Answer 2

Answer:

Ultrasonic is used to join plastic surface together