Which wave form oscillates both parallel and perpendicular to the direction of the wave motion? transverse waves, longitudinal waves, circular waves


The period of a mechanical wave is 2 seconds. What is the frequency of the wave?

20 waves/second
5 waves/second
2 waves/second
0.5 waves/second


The object distance for a convex lens is 15.0 cm, and the image distance is 5.0 cm. The height of the object is 9.0 cm. What is the height of the image?

3.0 cm
8.3 cm
27 cm
45 cm