Question

a. wavelerngt b. frequency c. speed d amplitude. e all of these. 33. The vibrations of a transverse wave move a. in the same direction as the wave travels. b. at right angles to the direction of wave travel. c. above and below the moving wave. d. opposite to the direction of wave travel. 34. Sound travels faster in a. air. b. water. c. steel. d. a vacuum. e. Sound travels at about the same speed in all of these.

Answer 1

33)
A transverse wave oscillates perpendicular to the direction of motion, ie. if the wave is traveling in z-axis, then the oscillations will be in x-y plane. Light is an example of a transverse wave.
So here, the answer is b

34)
Speed of sound is in materials can be written as SQRT[E/$\rho$]
Where E is the Young's modulus and $\rho$ is the density of the material.
In the list of given materials, E/$\rho$ ration is highest for steel.
So the answer is c