A teacher arrives at school and flips on the light switch upon entering the classroom. The lights do not come on. The custodian’s hypothesis is that a circuit breaker is open. However, the custodian finds that the classroom's breaker is not open. What is the next best step to solve the problem? A Make sure the lights are plugged in. B Check whether other breakers are open. C Notify the school administrators. D Develop a new hypothesis for why the lights don’t turn on.

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation:

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.