Approximately how much fencing is needed to enclose a circular pond with a diameter of 12.5 feet?

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.

True or false graphs must include scales that increase by the same amount

What happens to an isotope during radioactive decay?