Which of the following technologies would be improved by being made more efficient? Check all of the boxes that apply. longer-lasting batteries wind turbines and solar panels that cost less to build crops that require less pesticide protection power plants that burn energy faster

Katie and her father are looking at the pipes around their house. they find that some of the pipes have rust on them, making them look and feel different than normal pipes. what kind of change have the rusted pipes gone through? a. a physical change b. a vibration change c. a chemical change d. a temperature change