How is sound defined in science? How does this definition differ from the common meaning of the word?

Explanation:

In physics, sound is defined as waves. Sound, which needs a medium to travel through, travels in waves that our ears pick up. This differs from the word used in the dictionary because in the dictionary, sound would be referred to as the noise an object or animal or human makes. In physics, that is not the case. Space is a vacuum, meaning there is no air particles for sound to travel through, so space will always be silent no matter what. Planet Earth has air and other molecules, so sound can travel and be picked up by our ears. Hope this helps!

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.