People who suffer from anorexia tend to be skinner than those who suffer from bulimia. Both are eating disorders that deal with a person going through unhealthy measures to be skinny or feel skinny. People who have anorexia may actually starve themselves or feel when they are really underweight, while people with bulimia may overeat and than purge themselves for feeling guilty and fat.
Your voltmeter and your teacher are both right, but the water analogy of electricity can only go so far. One big drawback is that, unlike with water, there is no absolute voltage. .... Wherever you put the black lead is defined as "0V". .... flowing (i.e. the circuit is broken) you will not get this change in voltage.
