Here is my question for physics and the topic is prefixes

Can you use radiation to generate electricity

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

The slope of a velocity time graph over any interval of time gives the during that interval