Atrain is moving parallel and adjacent to a highway with a constant speed of 27 m/s. a car is traveling in the same direction as the train at 56 m/s. the car’s horn sounds at 580 hz and the train’s whistle sounds at 360 hz. when the car is behind the train what frequency does an occupant of the car observe for the train whistle? the speed of sound is 343 m/s. answer in units of hz.(a) when the car is behind the train, what frequency does an occupant of the car observe for the train whistle. after the car passes and is in front of the train, what frequency does the train passenger observe for the car horn?

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.