This is a type of wave that travels in one direction, but the energy travels perpendicular to this direction

Transverse wave

Explanation:

Transverse wave can be simply defined as a wave in which the wave particles oscillates perpendicularly to the direction of propagation of the wave. Some of its examples includes light wave and radio wave.

Transverse waves can be either mechanical or electromagnetic wave, where the mechanical waves requires a medium for its wave propagation, and electromagnetic wave does not require any medium for its propagation.

Thus, transverse waves can travel through with or without the presence of any medium.

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explanation:

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note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.