water is pumped from a borehole whose elevation is 564m to a tank in a school compound at an elevation of 2096m. the radius of the pipe at the inlet is 4cm while pressure is 400 kpa. at the exit the radius of the pipe is 2cm. calculate the pressure at the exit.(inlet = 2 m/s)

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.