You use apostrophe to show posession like dog's toy or Danica's phone!
The law of conservation of energy is an important law of physics. Basically, it says that while energy can turn from one kind into another, the total amount of energy doesn't change. This law applies only to closed systems, meaning systems that can't exchange energy with their environment
I would use it for good , when you do good you get good karma imagine all the stuff you could do for good to help others
