Click Play () and observe the sound waves emitted from the moving car. Click Pause () and compare the sound waves in front of and behind the car. What do you notice?

electromagnetic waves travel through space with vacuums. give me brainliest if right.

not moving. pos accel,

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.

there are no components of a physical goal mentioned on the list of choices that you've provided.