The particles of a substance can have kinetic energy (KE) and potential energy (PE). Which equation best summarizes the internal energy (U) of the
substance?
O A. U = KEtranslation + KEvibration + KErotation - PEintermolecular forces
OB. U = KEtranslation + KEvibration + KErotation + PEintermolecular forces
C. U = PEtranslation + PEvibration + PErotation + KEintermolecular forces
D. U = PEtranslation + PEvibration + PErotation - KEintermolecular forces

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.

you can cut your hand off if your not