I think it is ethically appropriate because he's taking a real thing that's happening and talking about it. It's giving him a topic to say about that might allow others to connect with or understand. Also depends on the topic
The turbine in a hydroelectric plant take the kinetic energy to turn the generator which uses magnets to cause the electricity to start to run.
Love story - Taylor swift
Yes it actually does because in most schools you have to have a gpa of 4.0