CK-12 Foundation
Ck 12: Plix: Types of Waves: Mechanical Wave
[Free Registration/Login Required] Move the points to change the frequency and amplitude of the waves while making the waves transverse or longitudinal according to the labels.
CK-12 Foundation
Ck 12: Physical Science: Characteristics of Waves
[Free Registration/Login may be required to access all resource tools.] Covers three types of mechanical waves - transverse, longitudinal, and surface - and their characteristics. Includes labeled illustrations and two video animations.