Question 5: Explain how your battery works. (HINT: You may want to look at lesson 3.02) What are some possible materials you could use to make your battery? DON’T FORGET TO include information about why it is important to use two different types of materials to make a battery. Also don't forget to discuss the electron affinities.

i don't know that i agree with that but what's the question ?

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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.