Atoms are composed of protons, neutrons, and

Electrons. I know because on talking tom and friends, talking ben made a scientific joke about protons and electrons. The word protons reminded me of that, so that's how I know it. Nothing to do with school. The end.

Electrons is your answer ,because every atom has to have those three(Protons,Neutrons,And Electrons)I know because we just finished semester 1 and we learned about that stuff. I hope this helps and you got some information out of this. Have a good day!

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.

it's a b and