Question

Which of the following describes a perpetual-motion machine?

A. A battery that contains one oxidized metal and one reduced metal
B. A renewable energy source
C. A motor that requires no energy input once it is running
D. An electric motor that is powered by an electromagnet
SUBMIT

Answer 1

c

Step-by-step explanation:

a p e x :)

Answer 2

a motor that requires no energy input once it is running